My 1990 chev pu started running really bad and was barley able to limp it back to my shop. I changed the fuel filter, no change. I have another engine, complete, same year so I swapped the TPS< MAP and all other sensors and still no change. As bad as it runs the (service engine soon) light does not come on. Is it possible that the ignition module is the problem or maybe even the computer?
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Re: 90 chev 350 runs bad
The ignition module in those usually work or they dont. But on the 90 model years , you have to have a pretty evident problem for the engine light. I would bet 1 of 2 things. The oxygen sensor at the "y" pipe is out, or the catalytic converter or muffler is plugged .ok that was 3 things, tell me how that works out for ya.
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Having owned and fixed many Fords, I have a few thoughts for you.
1- run some gas line anti-freeze through it, the methyl hydrate can clean a lot of crap out. 2- Fuel inject. / carb.cleaner. 3- new air filter. 4- new fuel filter. 5- It's not very likely, but if the other fixes don't work, you could do a rad flush, improper heating/cooling can do strange things. Also, smell the oil, if there's a gas smell that could mean a variety of things, some bad, some not. Hope one of these works for you. Grimm
TRY THE FUEL FILTER FIRST IF THE FUEL PUMP WAS GOING BAD IT WOULD STALL AS YOU PUSH ON THE GAS PEDDLE AND PUMPING THE PEDDLE WOULD NOT HELP FUEL INJECTION AND PUMPING THE GAS WILL HAVE NO EFFECT ON THE RUNNING OF THE VEHICAL
yes sounds like the fuel filter is clogged when push gas pedal put it in clear flood mood and resets the fuel system and starts over thats why it starts when push to floor creates back pressure sucks debri bottom of filter
have vehicle scanned, if you do not have a obd2 scanner. any auto parts store will scan for free. it may be a bad crank sensor. the car will stall at warmup and go into limp mode. it will set a code if bad. please let me know if this helps.
Is the filter on correctly? and if runs yes there is a filter inside the tank to. also since the prior owner did nothing to this car could be dirt inthe lines or the tank as well.
check the air filter too.
that sounds correct and its probably electric and in the tank. turn the key to the start position then listen for a small humming noise coming from gas tank if theres no sound then thats most likely the problem.