TKO

I had this on again off again engine code when i first bought this car used. and i got the code read, misfire or cat converter. I ruled out misfire because the engine timing is good, and runs very smoothly at all speeds. The people at auto zone said it was the converter. I told them it seems to go away if i fill up the tank and everything. they say that next time i fill up to buy a thing of rubbing alcohol and dump it in. I was told there is oil plugging the converter up. THis worked surprisingly. For aboout a week or two. Now the engine light is back on, should i keep doing the rubbing alcohol thing?

R.S.LOGAN

" the engine timing is good " doesn't rule out a misfire . Have you checked the condition of plugs / wires ?

TKO

I was told they were replaced less than 20,000miles ago. I will look at it tonight. But why did the engine light go off after pouring the alcohol in the gas tank?

R.S.LOGAN

Do you do a lot of short / stop start journeys ? or does the car get a good run ?

TKO

daily driver. do more highway than city usually.

R.S.LOGAN

That rules out another possible cause I was thinking of.

TKO

so what should i try next?

Bert

What are the codes you're getting? What engine and year?

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Bert

TKO

1999 Mecury Mystique. v6 dohc 2.9l i am pretty sure. I do not have the codes anymore, but when autozone read them the possible causes were misfire, and catalyctic converter

Bert

I'd get them again and see what we can see.

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Bert