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89 hard start runs bad
Extreamly hard to start. Runs bad up to 3500rpm's. Runs great after that. It has new fuel pump and filter. Plugs, wires ,cap and rotor.
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RE: 89 hard start runs bad
any codes????
someone may correct me, but before a certain threshold in the throttle, the computer takes readings from several different sensors to determine proper AF ratio, etc (i.e. o2 sensor, MAF, coolant temp, TPS, etc.) after the threshold is met like at WOT, the computer disregards many sensors and goes off preset tables. so maybe one or more of those items are out causing it to run bad at partial throttle. what do you guys think? |
RE: 89 hard start runs bad
ORIGINAL: raisinbran any codes???? someone may correct me, but before a certain threshold in the throttle, the computer takes readings from several different sensors to determine proper AF ratio, etc (i.e. o2 sensor, MAF, coolant temp, TPS, etc.) after the threshold is met like at WOT, the computer disregards many sensors and goes off preset tables. so maybe one or more of those items are out causing it to run bad at partial throttle. what do you guys think? |
RE: 89 hard start runs bad
No codes. I also put a new temp sensor in.
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RE: 89 hard start runs bad
was up, is it running rich? could be a stuck injector. or does it run better when it warms up?
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RE: 89 hard start runs bad
You say runs bad, sluggish, misfire, no power? Several things come into play. Injector clean, exhaust restriction, doubt it though since you have power after 3500 rpms. How is it on a cold start? Hard to start, misfire then straightens out? Could be air flow meter, hows the throttle response? Things to think about?[8D]
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RE: 89 hard start runs bad
Also, have you checked ignition timing? Make sure it is in base timing when you set it by unplugging Brown/Black wire to set timing.
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