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1994-2002 [Subscribe to Daily Digest] |
You want the 6ES, start checking the plugs yourself. YOU need to see the fouling for yourself and then later you will really know if the problem is fixed. Note if any cylinders are darker than the others.
If the small VAC line from the TB to the FPR is leaking, that can make the engine run very rich on part throttle positions. You could check that hose out yourself. A defective FPR could do this too, but that would be rare. FPRs can go bad in some cases after the fuel filter is replaced and contaminate particles get into it, but that is a lean hard start situation. I would remove the VAC line from the FPR and see if any fuel comes out of the FPR hose barb. If so, that is very wrong and would be one possible explanation, but that has never been reported here.
Someone has to check that the FPR VAC line also actually flows to the TB as well to know that the TB's orifice is not blocked.
A whacko MAP sensor could also make things rich.
The dealer can check the fuel pressure or simply try another FPR.
The fact that if you can get it to run for 10 seconds that things are then normal is quite perplexing.
The check engine light (CEL) can come on for many reasons, some quite complex.
I do not like what you say that the dealer is saying at all.
Starts easily before it chokes?
Once stable it idles fine as well?
Power then ok?
MPGs then ok?
Gets onto boost then ok?
An intake VAC leak at idle that allows air to enter downstream of the MAF would tend to make things go lean, not rich. As far as things been flakey goes, the MAF itself could be as much as anything else.
Did you take the vehicle into the dealer for the first time for such things while the warranty still was going?
At some point you will have to run some Techron Concentrate thought the system to help clean up carbon fouling of the combustion chambers.
When the plugs are fouled, do you also get ignition mis-firing?
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