2003 cobra issue

[wrestler12]

Hi so my terminator is tuned for e85 and my father put normal pump fuel in it and drive all day. Since then, it falls on its face in WOT. I drained the tank and put a full tank of e85 on it. However it is still falling flat on its face. The only think I think to do is to change out the spark plugs?? Anyone have any ideas. Please help!!


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[01yellercobra]

How did he drive it all day with the wrong fuel? I don't have a lot of E85 experience, but from my understanding the car wouldn't run very well with the wrong fuel. If at all really.

 

[hotcobra03]

scan for codes?
even if check engine light isn't on

 

[slow98cobra]

I think you are on the right track. Plugs may be fouled. Do you still have cats?

 

[decipha]

if its got anywhere in the realm of a good tune then the kams have trimmed the fuel out for the pump gas and youd be getting lean stumbles now from the old bad data

do an ecu reset to clear the adaptives

 

[04sleeper]

The car would have run way rich. Fuel trims can only do so much. Hope he didn't wash the cylinders out and hurt the motor. Change plugs, KAM rest and cross your fingers for good luck.

 

[03cobra#2]

Interested to see what happens here.

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[hotcobra03]

what about fuel filter

mix of gas may have done something

it will cause this issue and no code

worth the couple bucks

 

[slow98cobra]

The car would have run way rich. Fuel trims can only do so much. Hope he didn't wash the cylinders out and hurt the motor. Change plugs, KAM rest and cross your fingers for good luck.

That’s kind of what I’m thinking as well. Pig rich for a bit may have fouled the plugs. Do you think one tank of fuel at being that rich could have plugged the cats on the car?

Curious to hear the outcome on this one.

 

[01yellercobra]

I'd still like to know how many miles he actually put on the car with the wrong fuel. And how he didn't notice the car not driving correctly.

 

[wrestler12]

I'd still like to know how many miles he actually put on the car with the wrong fuel. And how he didn't notice the car not driving correctly.

He probably out 40-60 miles in total on it. It drives fine until you go to jump on it so he never noticed it


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[03cobra#2]

I'm guessing the ecu is correcting like crazy to try a and keep 14:1 af, then when you go open loop the ECU just dumps fuel in causing the car to bog. Did you replace plugs yet?

 

[wrestler12]

I'm guessing the ecu is correcting like crazy to try a and keep 14:1 af, then when you go open loop the ECU just dumps fuel in causing the car to bog. Did you replace plugs yet?

No I haven’t yet because it’s been snowing like crazy so I probably won’t be able to take her lout until spring


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