hi there ,,i have a 91 legacy,witch i had just bought to get myself to work but now i have a major problem,,the car will start just fine when you turn the key,but when you give it gas it boogs out,,,even when i try to drive i can barley give it any gas in order to go forward,,,and then its at a snails pace,,,,but when she gets going it seems to work ok.
I have changed all the filters ,new plugs and wires,,,PLEASE HELP
When changing out the plugs, make sure you didn't try to use v or quad performance plugs, or as far as I know, most plugs from Bosch. I've heard those things perform badly in a Subaru.
Do you get a check engine light?
Even if the check engine light isn't on, you may still have trouble codes stored in the computer.
Under the dash, usually between the steering column and gas pedal you should find some harnesses that are not plugged in. A green set, and a single wire, black set. If you plug the two, single wire black harness halves together, then turn your ignition key to the run position, your check engine light should flash out any stored codes. Long flashes indicate the ten's place, short flashes the one's place. So, long-long-short, would indicate a code 21. (-; Codes will be in numerical order, from lowest to highest, seperated by a pause in the flashing, and after the last code is displayed, the codes will be listed from the beginning again.
More in depth instructions and the trouble codes can be found here:
I am ssuming It is an important sensor first guess. check ecu codes.Running good while warm is more of a strain on fuel pumping, hence it would get worse after warm if it was the fuel starving...verify by flooring it once warm into higher rpms. Its obvious if to be failing. On FI subarus there is a thermal sensors doing alot of freakin work to run the car good... You could throw the intake into the forest and make another, then go back to 1935 and mount the perfect carbeurator... Hesitating while cold may coincide with coolant consumption. If so, and there is no ecu codes, find the leak. Sometimes gaskets swell back to a decent function on warm cylinders that like to fire anyway... 1991 is quite a long ride... Dirty stuff does this too. An engine cleaning thorough could be a cure... Good luck, that year was a good one. Unless you got the strange firing order...
"shawn066" wrote in message news:979231 snipped-for-privacy@autoboardz.com...
I would never buy a bosch spark plug given all the problems i had with them in the past.
From the subaru diagnostics chart: Look for codes Cracked vacuum hose/vacuum leak > When changing out the plugs, make sure you didn't try to use v or quad
I had the same problem in a Mazda 323 and the problem was spark plug wiring harness/distributor cap. The ignition was being shorted out somewhere.
Adam
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