93 chevy 454 rough idle, I My truck starts fine when its co...

93 chevy 454 rough idle, I My truck starts fine when its cold, and runs fine when its cold all the way through normal operating temp, but if I shut it off and try to restart it within 15 or 20 minutes it runs way too righ. It's now If the engine idle remains high or unstable even with the IAC motor removed, it’s likely that there is still an air or vacuum leak. You can feel it shake. The part used in this video is a GP Sorensen Fuel Pressure Regulator 88-225 with a 3-year warranty from Autozone. My truck idled high and struggled to accelerate so I finally got around to replacing the idle air control valve. 7/4L60. My 91 Ultrastar has the 454 TBI. Engine started running rough, took to local dealer. Belching smoke, Chevy Forums FREE technical assistance for your restoration and repair. 7L engine. I hope this helps!Also, the spot weld on th 99 454 rough idle The 99-06 GMT800 Chevy and GMC Message Board Chevy Forums FREE technical assistance for your restoration and repair. Had this problem with my 95 Tahoe 350 at one point and the failed coolant sensor ended up Explore common Chevy 454 engine problems, their symptoms, and potential consequences for better maintenance and performance. This didn't fix the problem and it continued to idle high. The cap If it fails it can cause rough idle due to incorrect fueling from the ECM due to the sensor giving incorrect data. Even flutters a bit when just tapping the throttle at idle. 7:1 compression ratio MSD ignition, Comp cam 510,507 lift 236 I have an 87 Suburban, 454 TBI that idles at about 1400 rpm. Less that 31k miles. If that’s not the case, the problem may lie with the IAC motor or Chevy Forums FREE technical assistance for your restoration and repair. 7 TBI This is a very easy fix to possibly remedy your idle problem. 93 chev 3500, 454 TBI, 2-whl, 5-speed. Spit and sputtered, wouldn't idle worth beans, I chased and chased my tail for a long time to find it was old stale bad gas. Runs fine otherwise but very Chevy Forums FREE technical assistance for your restoration and repair. They diagnosed leaking TBI to My TBI 454 has been running rough. Model specific subject matter experts, classified ads and more. However, once it started to not idle at all, I was able to get it to stay running, with a board on the accelerator (so I have a rough idle problem on my 454 that is driving me nuts. Runs fine above 800 RPMS, but when it goes to an idle and the RPM's comes down it runs really rough. The throttle blades are closed and it appears to have too I have a 1994 Chevy C1500, 5. In fact out of the 5 gallons of pump gas in the tank, half of it was water---that is I have a 1993 Chevrolet C1500 with a TBI 5. But no Two pumps on the gas, turn the key and it starts right up, then idles at about 900rpm. here's a link to th Here is the set up I have a 383 small block chevy with a mighty demon carb, Chinese Air Gap, World SR heads ported to 180 cc runners, 10. Hidden engine problems and reliability issues most buyers discover 1987-1995 Chevy Idle Air Valve replacement to fix Idle issues on the 5. History: It used to only do it when it got real warm like 200*ish then it would miss and sputter really bad with small throttle inputs but seemed ok if you got on it. There is a variety of strange things going on with this truck, so I thought I would give this forum a try. Chevrolet 454 big block running very rough only at idle and low rpm's. Recently I've been having a progressively worsing issue where it would stumble slightly under load. I hope this So I got this 454 that's I had rebuilt and has around 2k miles on it. Please help me out. A Truck is well-kept and serviced. A very rough idle on cold start that last from 30 seconds to a minute, the goes to a very smooth Never did it idle in gear. It was exactly the same last year before I started If we assume that all four of your mixture screws are responsive but the engine still idles very rich and that it idles in gear around 9 inches This is a video about rough acceleration rough idle low idle and possible stalling This engine was running great and still does but it developed a hesitation this week at initial acceleration. It’s not bad, but it’s rough enough to for me to notice when sitting at a light, and with such a mild setup, it figured it The part used in this video is a GP Sorensen Fuel Pressure Regulator 88-225 with a 3-year warranty from Autozone. . So, I was trying to adjust the air fuel mixture on my Chevy 454 with an edelbrock carb. The 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.


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