Sounds like you may have a clogged catalytic converter. You can try removing the upstream o2 sensor so exhaust leaks out, or separate the exhaust somewhere before the converter.
Idle air control , air intake or emission system would be my guess. . Do the maintenance like new air filter, clean the MAF and TB and see if it gets a bit better. These are the cheapest things to try before you spend more money on it. It’s a good idea to check all your sensors and grounds. Make sure they are clean and functioning properly. If you clean everything and it’s still behaving badly and stalling when warm, then check your ecu for faults. A simple ground fault or cracked circuit can cause issues. There are many possible causes, you’ll have to check things one at a time and rule them out. Best of luck.
Engine temp sensor or its connector is bad.
SOURCE: s10 pickup after warming up truck starts missing
You might have computer problems.
Does the check engine light come on when it starts to miss?
SOURCE: 2000 silverado 4.8 v8 runs bad when it is cold out side.
Try replacing the coolant temperature sensor for the injection system.
SOURCE: 1989 ford f150 w/ 5.0 liter..... engine light on
I would check the oil pressure of the engine. The reason is the timing chain tensioners are run with oil pressrue. I think your timing chain tensioners are leaking down when engine is getting to operating tempature . The oil is thinning down as warms up , as it should to lubercate . I would check compression and do a cylinder leak down test on all the cylinders. Then if the compression is good and the cylinder leak down is good. I would change all the timing components, ( chain, timing gears, timing chain tensioners )
Good Luck , I hope this helps.
SOURCE: aurora 1997 i have changed the fuel pump,, fuel filter plugs,
Hi there
sounds like you done allot to this car. did you clean your gas tank? Reason i say this there are times you get bad gas that water with it. and it sounds like you got water in your tank. need to get it out. Try this get some rubbing alcohol and poor it in your tank. It won't hurt it. It will soak up the water that's in your tank. try this and let me know how it goes.
Thank you for writing to fix ya.
Best Regards Richard
Testimonial: "yeah, i did that this morning, the gas tank had a bunch of **** in it, changed fuel filter, tank needed cleaned same prob still thanks though"
SOURCE: 1998 Ford F-150 4.2 V6 starts and idles fine ibut bogs when step
i had a van do this same thing to a tee turned out to be a broken key pin in the harmonic balencer causing the timing to ****** replaced balencer and ran like a dream there is a crank sensor grid on the balencer when the key pin broke it trew the timing off
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I have an 03 s-10 check engine light on code po 300 idles rough bad miss. I've replaced map and mass airflow snsr cap rotor button plugs wires the distributor waterpump and timing chain cover help
I also did fuel pressure test it wss perfect no bleed off. I haven't replaced iMac or fuel filter yet but it's bout to drive me crazy on way to the poor house
Was supposed to say I.A.C. VALVE
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