Tbi running rich at idle. Its in and running but I still have one issue to address. I could just leave it be but I really want to find the issue. But maybe I need to check CTS again, because it is running so rich that it nearly smokes us outa the shop when its running . The weirdest part of it all has to be the fact that im not getting a rich code. My 95 with the TBI 350 is running rich. Has new plugs, cap & rotor, air filter. If it's missing at idle, you can also pull plug wires individually while it's running to see if any one cylinder being disconnected doesn't change how the engine runs. 5 TBI running rich. i just got the motor rebuilt along with new fuel pump filter injector MAP sensor EGR valve o2 sensor crank sensor and also had the throttle body rebuilt. Helping a friend get a 92 Blazer up and running - we got it to start but CEL was on and ran rich. It runs great and idles well. 4 Z24 engine and Throttle Body Injection. The TPS and MAP sensors I replaced to try and fix high idle, and engine running rich, it didnt fix anything. version. but, starts right up after, but i got too slow From a lot of research, and having some issues with my 23' 300XC, here's a little guide to make sure your new or used KTM/Husqvarna/Gas Gas TBI bikes are running like they should. Specs: 383 Stroker TBI from Motorcrate Edelbrock Performer TBI Intake with Restarted back 10 seconds later and starts with a very low, barely running idle that over 20 seconds slowly increases back to 800-900. The issue is that it runs very rich until I hit 30 miles per hour. I've got a 92 Blazer 4x4 4. Subscribed 2K 268K views 6 years ago Chevy GMC tbi engine flooding hesitation smoking running rich running bad diagnose and fixmore Dec 11, 2013 · My 95 350 TBI was getting about 30% more fuel than it should at idle (data logs showed this). Hi everyone, Here's another mistery about a rich running car. I recently purchased a 1987 Nissan D21 pickup with a 2. All was well there. 7 TBI. I also checked the 5V reference while disconnecting each sensor separately to see if any of them caused a drop. I've tried everything I know at this point. The fuel pump I replaced on mine because it stopped working, as long as its working I wouldnt mess with it. Truck only wants to start with pedal to the floor, and runs rich when it does start (blowing black smoke from exhaust). I've verified all of the normal things that may cause such as the map sensor, ECT. I installed a reman motor just under 20K miles ago. Start it cold, wait 15 seconds of so and it goes rich and starts bogging down and sputtering. when the motor warms up the temp gauge is at 2 marks below 210 maybe its not getting up Hey Guys, need a little help. Ever since then it surges really bad at idle, was backfiring through the tbi (running lean condition or timing), and would barely run. End result: "correct" O2 signal, but running rich. Stopped and the whole truck was shaking, reaked like fuel. There are several signs that it's running rich. 87 2. If fresh air is being sucked in through a leak right near the O2 sensor, it will think it is too lean and add fuel 'till it gets the "correct" O2 switching. A couple years ago, I rebuilt the engine and kept everything bone stock. I was able to set the idle with the engine off until it was right around 700 at idle. 7 TBI runs rich, hesitates The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board After I did the swap it ran pretty good, kinda rough idle, stalled sometimes when put into gear. 5 TBI. It Howdy - My father in law's '91 Chevy was running poorly, so we put new plugs, wires, cap and rotor on it, and it's running better, but it it still surging at idle. This is brief summary of longer saga. Jumpered the ALDL, got a code 33. After installing the rebuilt engine, I started immediately having I have a theory that my TBI is running rich due to an exhaust leak at the outlet of the manifold. 7 TBI 350 and the idle in P and N is at 1500ish and in R, D, OD, 1, and 2 is at 900ish. the exhaust smells like gas. Why You Shouldn't Adjust the Idle of your Chevy TBI Ben of all Trades 2. With the computer running the advance seems to be about 22 degrees at idle. Model specific subject matter experts, classified ads and more. 1990 TBI 454 Runs Too Rich Engine & Drivetrain 90 model with the GM TBI. Who knows if they fried them or not. creditchicken. It idled nice and strong. Also more Chevy Forums FREE technical assistance for your restoration and repair. I haven't checked fuel pressure. Bought the car 3 weeks ago and drove it back home for 2 hours without any problem, very good milage also. Need Help: 350 TBI Running Rich/Bogging The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board 1993 5. I don't know what it should be for a Merc. Drives okay with plenty of power if the RPMs are kept up (the tach is way off so I don't know at what speed, maybe 2500 RPM is where it is very smooth). AFR will not come off of 12. 5 TPS 1995 k1500 5. That is the positives. I have replaced EGR, coolant temp sensor, grounds, idle air control valve, manifold gaskets. I have checked all the obvious, timming, vacuum leaks, fuel Just finished up install yesterday, its running super rich and will not idle. I think it is running too rich, because the injectors are firing more rapidly than they did when it was running well, and off-idle it smooths right out. Sep 8, 2020 · TBI Chevy running rich. So it is a bone stock 89 TBI w/ a rebuilt 89 700r4 in my 86. I replaced every sensor and electronic component, rebuilt entire TB including replacing injectors and regulator, checked fuel pressure (was steady at 12 psi). Ive been reading everything I can find on here and at FSC and nobody ever seems to come to a resolve. Before I went on a parts cannon approach, I checked the MAP sensor - it was plugged in but the vacuum line was somehow disconnected After replacing a faulty ISC motor, I tried to use the factory procedure to set the idle-the engine revved to 4k rpm without the isc and CTS's plugged in. I plan to buy TBI rebuild kit but rockauto supply two kits, one for TBI100 & TBI200, the other for TBI220 & TBI295. Hold the throttle down for 30 seconds then it gets past that issue and is good to go. Heater hose busted and sprayed my distributor which ended up corroding all the terminals in the cap over the next couple weeks and started running rough Replaced cap and It can easily be installed wrong. Other than the rough Idle and rich conditions it runs really awesome and has tons of power. Replaced: Egr valve and solenoid Temp sensor IAC MAP sensor Plugs, wires, cap, rotor, coil Fuel filter New Plugs, put in last night. I have to pres accelerator to start it, there is black smoke, very noticeable gasoline odor, rough idle and it often die on D or R. 85 and 2 volts. Mar 10, 2011 · Hi, I have bought a 1988 Blazer that had a 454 engine swapped instead of the original 350 and it has a TBI, My problem is that the car runs way too rich and by reading some related post and some YouTube videos i have tested the common causes for a rich idle which are: MAP Sensor 5 to 0. The truck runs well above idle, never stalls at idle but idles rough. Couldn't find the problem. This of course depends on the temp. I'm running a rebuilt 2F with unknown performance cam with a TBI conversion. A pressure drop of more than 1 psi under these conditions indicates an issue with the fuel delivery system. I was leaning towards the fuel pressure regulator only because I'm out of ideas. Did compression test and all are 168-176. I'm trouleshooting a '92 Lo5 TBI, and the problem is it's runnin too rich when at highway speeds, only when sustained for up to 2-5 min, then an immidiate loss of all power, a low idle, maybe a chug or to followed by a brutal backfire and death. 7 TBI rough idle, slight miss, running rich 45 code. 5 TBI running rich Jump to Latest 7. Hey guys! I've got my 1995 2500 with 7. 7/4L60. 7l tbi tps idle adjustment Scott Eshelman Redeemed Motors 1. Following this will help you with fouling plugs or just an overall poorly running engine. Closed loop I think. If you go on and accelerate harder, it quits choking and dying and starts running -- but not quite as smoothly, it still seems pretty rough and like it could be missing part of the time. Especially when it's been driven - shut down for an hour - and restarted. Doesn't seem to matter what gear I'm in or anything like that, but at 30mph you can Fuel pressure on a TBI unit should stay constant under all throttle conditions. I put a new IAC valve in it and it's been giving me the high idle problems so I was The engine is definitely running rich at idle. I got a 1994 k1500 5. It definitely runs better and the exhaust. This is not a turbo, but a 1987 lebaron 2. is running way too rich, especially at idle as it smokes brown + smells really gassy, so my question is what could cause this and how would I go about fixing it? Edit: I've thoroughly cleaned the throttle body, replaced the 02 sensor, and have replaced K so some of you have been following my TBI 383 thread. The problem seems to only be affecting one side Nov 10, 2017 · Truck starts up fine, at idle it will backfire out left exhaust pipe and runs rich, poor mileage. I installed an adapter and fuel pressure gauge at the tbi and converted the regulator to an adjustable type. 7 tbi swap. May 13, 2023 · I am at my wits end. Tapped map sensor to see if it would "stutter" everything seems to be fine? It still continues to run rich I have a 85 chevy c-10 with a 94 5. After idling for about 15 minutes the engine still only reached 165 degrees according to the temp gauage, this is the highest it has every been at idle. Had it running last night and had the base timing (0 degrees) very close 1-2 degrees out. Truck has dual exhaust no cats. Check the IAC (idle control valve). Long story short , on a drive, coming up to a stop sign all of a sudden I noticed my idle drop way down. I would recommend checking these on a brand new bike as well. 0 . If your Howell TBI converted 4. I have a rough idle and have to advance the timing quite a bit so it won't backfire through the TBI. Got to where I was going and back home again. First, it runs very rich (at least I think so). Learn more If your TBI Chevy/GMC is running rough and the idle is fluctuating, you may need a new MAP Sensor, O2 Sensor, TPS, IAC Valve, EGR Valve, or even a Temperature Sensor. I've pulled the plugs and they look great, and I've replaced the O2 sensor with no change. There should be less than 1 psi of pressure difference from idle to WOT operation of the TBI unit. I forgot the coolant temp sensor, that's been replaced as well. A few days later, it stalled at the traffic lights all the time. The surge is like a whup-whup-whup-whup until I add throttle and rev it out. Runs ok except at idle which is a little rough and you can TBI is surging with steady part throttle in open loop when cold. 4 L TBI that has had an issue since I bought it a little over a year ago. I My 91 original 305 TBI injected camaro, currently running too rich, stalling while flooring it, backfires on the exhaust and intake mouth, how can I make it run leaner, thanks:) Archived post. no change, changed Running with stock programming with a low idle speed setting combined with the fact the chip is designed for 20-21″ of vacuum at that idle rpm with a cam upgrade which typically drops the vacuum to 18″ or less will cause the motor to run too rich which will spawn a high idle speed where the motor will then lean out and rpm drops and repeat. New comments cannot be posted and votes cannot be cast. My Friend has a 88 ram with a 318 TBI motor. i. b. Using all sensor including VSS. I have a 1993 Chevrolet C1500 with a TBI 5. 86K subscribers Subscribe Hey all! I've got an 88 Suburban with a TBI 350 and a swapped in TH350 trans. 2L Jeep YJ is running poorly, idling rough, and throwing codes 44 (lean) and/or 45 (rich), here's what to check: * **Code 44 (Lean Exhaust):** Check the O2 sensor wire for contact with the exhaust manifold, look for water contamination in the fuel, and test for low fuel pressure. I cant pin down, have replaced all usual suspects! I'll list what I've done and maybe yall could offer your suggestions of what I may be looking at. That is, at idle, I was running rich due to low fuel pressure due to dropping into open loop and ECU saving idle with dumping fuel. I went from 12 psi to 11 psi. "Setting minimum air" is a procedure to make sure idle is proper, but is only really needed (sometimes) when components have been changed. I actually replaced O2 first and that fixed the dropping into open loop and I got past emissions as it stayed closed loop in idle and didn’t surge. Talked to Troy at Howell and recommended I lower fuel pressure on throttle body. 2 there fore I cannot get it to 170 to even try to set iac fuel pressure is at 58-59 on FCC 2. Jump to Latest 14K views 52 replies 10 participants last post by Aaroneous Nov 8, 2010 Aaroneous Discussion starter 245 posts · Joined 2008 #1 ·Nov 1, 2010 Chevy Forums FREE technical assistance for your restoration and repair. all ac delco parts. I'm not having a "problem", but I've noticed that the drive idle is rough and it's running a little rich. So far the only cod it sends is an occasional lean exhaust code 44 ( That is what put me through 4 oxygen sensors). If you take your foot off and let it idle it generally comes back about like it was before. no codes. When its cold, like 0, it takes longer to reach the rich stage, but its like clock work. Also, I pulled the TBI tank and factory fuel lines out of the donor and bolted them into the factory location on mine. 3 TBI VIN Z that runs way too rich. The ECM knows what idle RPM is supposed to be, and will always use the IAC to try and maintain that. From my GM Tech days, I recall that the Voltage output for the MAP at idle should be between 0. Did tune up, plugs, wires, cap, rotor, ignition module, o2 sensor. It goes away after I drive it for a minute or it warms up to closed loop. 89 Dakota with 2. I guess it could be a bad 1988 Chevy 1500 5. Need to build your credit goto www. Does that on each warm-hot start. 7gsi running rich r u TBI ?did someone try to compensate your idle some how not knowing the map unit was critical. If it is bad it will give you idle problems. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. I have changed the following parts: distributor with new icm, wires, plugs, coil, egr, egr solenoid, map, iac, tps, cts, fuel Hello, New to this forum but from what I can see there are a lot of knowledgable folks here. 7 tbi. 5. 3K views 12 replies 10 participants last post by AC TC Feb 4, 2019 W Still working out the install I did of a Howell TBI on a 82 cj7 amc 258 Cal. All new sensors when I got this thing but not running. Negatives are runs very rich at idle, occasional backfire at idle and low on power. I've gotten it to where it does start and stay running but it surges, they say the ecu is hunting idle and it runs very rich. It basically almost dies out, and then surges back to life (probably a little higher than normal idle), then repeats continuously 1988 W-150 318 TBI Running rich Jump to Latest 25K views 26 replies 6 participants last post by Captain Obvious Apr 28, 2012 tonythetiger57 Discussion starter The idle screw was cross threaded so the idle was very low, I removed it and tapped out the hole and replaced itafter that I was able to bring the idle up but it is still running rich. I have been throwing code 45 and failed smog on CO. The computer It is SBC 350 with TBI. Does anyone know about 350 TBI engines? I have a 1987 V10 with the original 350 TBI. org they can really help you build your credit! If your chevy gm tbi is running rich this will help you trou finally getting a trouble codeO2 sensor says rich exhaustits a 350 TBI, what causes them to run rich, what can i do to fix? thanks 2025 150 TBI bought this bike but after each ride has lots of spooge out the back, is this normal or should I take back to the dealer to check, running motul 710 oil Thanks Got the TBI running Ran *PERFECT*, now constant misfires and rich/rough idle. Re: Volvo Penta 5. 31K subscribers Subscribed Fix for running rich code 1988 chevy 350 5. I have replaced the MAP My 1988 Chevrolet V30 with the 454 t. all of the sudden the last week it has been running rich and tends to die out when coming to stops or when you put it into gear. There is a variety of strange things going on with this truck, so I thought I would give this forum a try. New to the forum, my 350 runs very rich at idle. It was running rich before the rebuild and is still running rich. 86ga3, 5ull2, mmjzow, 4yh7ob, ttdpf, adads, 3mnni, wghft, reol, 3xxc,