rough idle on 302
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rough idle on 302
Bought a 95 F150 4x4 automatic, supercab, since I bought it I have a rough idle and stalling at stops and in reverse. I changed MAF, cleaned and tested EGR, IAC, cleaned throttle body and so on. After I changed MAF it ran worse. After I cleaned the throttle body it ran good enough to plug the MAF back in. But it still is not correct. It will run but it will chugged and wanna stall at low idle. I am not sure on vacuum leaks. I have not checked for a code since when I plug in the MAF it goes away.
Things I know about truck, the catalytic converter is gone so the vacuum lines to the exhaust air supply valve are plugged/gone. Truck motor was pulled from a 94 F150 and installed by a "great" mechanic (note the sarcasm).
Im lost as of this point. Call this a dumb question if you want, but if the catalytic converter is gone would it run rough? The O2 sensor before the CC is in place. I don't know.
Things I know about truck, the catalytic converter is gone so the vacuum lines to the exhaust air supply valve are plugged/gone. Truck motor was pulled from a 94 F150 and installed by a "great" mechanic (note the sarcasm).
Im lost as of this point. Call this a dumb question if you want, but if the catalytic converter is gone would it run rough? The O2 sensor before the CC is in place. I don't know.
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update on 302
I went and got the codes checked. I got 565 canister purge circut failure, 165 MAF below minimum voltage and 172? lack heated o2 sensor lean bank 1.
I figure the o2 code is from not having a catalytic converter and o2 sensors but the guy said the MAF would bring that one up. I do not know what the below volt one means for the MAF. It has a new one, I tested it and it worked.
I changed the spark plugs, wire, dist cap and rotor. It seems to run just as bad. I properly gapped the to the sticker on the truck, they are motorcraft plugs. One thing I noticed was that when I got the truck the previous owner had 2 wires switched on the cap. When you would switch them back to the proper firing order position the truck acted as if it was missfiring. So I put them back on properly, and it dosent seem right. But I didn't think you can alter the firing order. Did the compter learn to run like that?
So anyways I am still lost completely. Any ideas folks?
I am getting to the point with it that I am about to sell it....
anyone in WI wanna a 95 f150? Ha.
I figure the o2 code is from not having a catalytic converter and o2 sensors but the guy said the MAF would bring that one up. I do not know what the below volt one means for the MAF. It has a new one, I tested it and it worked.
I changed the spark plugs, wire, dist cap and rotor. It seems to run just as bad. I properly gapped the to the sticker on the truck, they are motorcraft plugs. One thing I noticed was that when I got the truck the previous owner had 2 wires switched on the cap. When you would switch them back to the proper firing order position the truck acted as if it was missfiring. So I put them back on properly, and it dosent seem right. But I didn't think you can alter the firing order. Did the compter learn to run like that?
So anyways I am still lost completely. Any ideas folks?
I am getting to the point with it that I am about to sell it....
anyone in WI wanna a 95 f150? Ha.
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