Car will not run, once running will not run smooth once warmed up
I have taken it to a mechanic, put way more $ into than i paid for the car. I took the catalytic converter off of it, had no immediate problems. Then it got to wear once it warmed up, it would start missing, like it was out of time. Took it to a local mechanic, he went over it, and over it and came to the conclusion that there was a sensor out somewhere, it would cost me, for him to find it. he recommended that i switch it over to old school, new manifold, distributor, and carb. Any help would be greatly appreciated.. I could go either way to get the ol girl runnin..sensor or switch it over, i just need little advice.
Re: Car will not run, once running will not run smooth...
Check the exhaust manifolds. On a lot of the engines there is a little vaccuum operated valve that is supposed to help the engine warm up faster to reduce emissions. A lot of times it gets so rusty that it gets stuck and will make the engine run rough after it warms up. Had it happen on my 83 with the 307, so I disconnected and plugged the vaccuum line and made sure the valve was open. Also check for a stuck/bad egr valve or other vaccuum leaks.
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first you did not mention your car brand. Anyhow its not seem ens a big problem.what i understand is your car advances not working properly & secondly your car ignition coil(s) or both plug cods & coils.
in last your car can not maintaining low rpm it might be from throttle body idling switch or main butterfly ..... or might be your car Tappet sating out or some head valves are jam ..do a proper check from codified mechanic ..... this is a basic of your car, now if you need any further help you can mail me on firstname.lastname@example.org... best of luck....
need to check fuel pressure, not just listen for pump to run, also check reading on coolant temp sensor, but sounds like fuel pump /filter issue. just because you hear pump run doesnt mean its putting our right amount of pressure. also check for plugged catylic convertor
Long time ago one coil and 4, 6, or 8 plug wires changed to a mini coil for each plug, your car most likely is one of those. However if i runs fine after it gets warm I would want a second opinion before I bought new coils as I bet they are not cheap. Sometimes a dealer, who sees lots of these, can be a good place for diagnosis. The have the correct tools, all the tech bulletins and again they see lots of these motors.
My guess would be that the valve timing is off. Did he machine the heads at a machine shop? Have the valves checked/done? New head gasket? New head bolts? What year is it? It sounds like you may have 2 different issues with the starting and it running rough...however, does it smooth out after you let it warm up? Is there an engine light on in the car? What are the codes?
Without your actual trouble code, I am assuming that you are have a misfire on cylinder # 5. The computer cannot really tell what is causing the misfire only that cyl 5 is not putting out full power. If it misfires when cold then smooths out as it warms up, I would say it is probably an injector that is sticky, as it warms up it starts working properly.
possibly a bad module------cracked---or???? In any case you may get expansion as engine compartment warms up----module shuts you down. Sometimes really hard to diagnose and just putting in a new module is "spendy"----especially if it turns out not to solve the problem!
probably oil, it may be too thick when it's cold but once it warms
up it liquefies and your engine runs smoothly. you could try changing oil, I'm
guessing if you have a high performance oil the chances this is the problem may
be greater since high performance things are usually geared towards working well
when everything is hot