1 week ago brought a higher grade of gas,the next day after i brought the gas the engine lite came on.I drove the gas out and the lite went out,filled up the tank with 87oct ,The lite came back on 2hrs later.
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Re: no.1 cylinder is misfirering
I have known some cars, ford in particular, to shed carbon from the piston top periodically, like peeling paint. some of this can get stuck under a valve seat with resulting loss of compression. i do not know why this happens. alternatively, town running deposits which used to be very common still occur sometimes. soft carbon deposits created on the spark plug during low speed (town) driving can become baked on rendering the spark plug useless if the engine speed/load is increased too quickly instead of being burned off which usually happens.
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Hello I have a 1995 Sonoma 4.3 with 150.000 on her and she ran great tell last week went to pick up a lite trailer and dove it home no problem drove it all day after that. The parked it running fine and next morning it won't hold a idle but clears up at 3000 RPM runs fine drop in gear and it won't stay running??? Cleaned TBI and there was a new fuel pump and filter put on it less them 7.000 miles ago. Found vacuum leak on the booster to manifold fix that still runs like it is misfiring??? Any help would be great thanks no check engine light on.
Wow! The engine is running like **** with misfire codes? I think that's what you were trying to say. First, stop all the "miricle cures in a can"...fuel injector cleaners, K&N filters and the such. They will only do more harm than good. Next, replace your distributor. Honda igniters are notorious for causing the symptoms (and codes) you are describing and they are only serviced in a complete distributor assembly.
I'm going to go out on a limb and sugest that you look for melted wires in the engine compartment. That would explain the burning plastic smell. And a bare wire grounding on your engine could cause about 100 diferent problems.
The concern is likely caused by the coil which sits on top of the spark plug. Your P0301 indicated misfire on cylinder 1. Your P0316 indicated it occurs on the first 1000 revolutions. Your P0171 indicated lean on bank one. Bank one includes cylinders 1,2,3 and 4. Your lean code is strange but could be related to misfire. I would recommend swap the coil on number one with number two. Clear the code and drive it. I would expect to see a P0302 which indicates the misfire traveled with bad coil. good luck.