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Old 11-11-2004, 13:09   #1 (permalink)
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Engine Run-On in EA MPFI (Converted)

Hi all. I've got a 10/90 EA that has been converted to multi-point. Just recently, I've started getting engine run-on, and it's been getting progressively worse, to the point where this morning I had to let the fuel pump go for 2-3 times to get fuel back into the rail.
Some other info: I think my ISC is buggered, when I'm in gear at idle it sits at around 6-700 rpm, however, when I put it in park after it's been driven, the idle kicks up to around the 1800 rpm mark. It then dips really badly when I put it back in gear.
The other thing is my cat converter is restricting exhaust flow quite badly at the moment, it's stuffed.
So basically, what should I be looking for to stop the run-on? Could the faulty isc be causing it, by still letting air into the manifold after the car has stopped?
Any other ideas? Any help would be appreciated.
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Old 11-11-2004, 21:29   #2 (permalink)
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Re: Engine Run-On in EA MPFI (Converted)

Spope, Im having the EXACT Same probs with my EA CFI! Damn Metallic Blue EA's
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Old 11-12-2004, 00:29   #3 (permalink)
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Re: Engine Run-On in EA MPFI (Converted)

spope make sure the ISC and TB are both attached properly, that could be causing the idle problems perhaps... that and vacuum leaks, check all ur vac hoses
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Old 11-15-2004, 23:00   #4 (permalink)
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Re: Engine Run-On in EA MPFI (Converted)

Timing isn't the major issue here, fuel still getting into the combustion chambers is. Half your injectors must be leaking.
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Old 11-17-2004, 00:53   #5 (permalink)
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Re: Engine Run-On in EA MPFI (Converted)

It's not my timing - my timing is in fact retarded at the moment by a couple of degrees.
I am now almost positive it's a tps issue, as my tps is playing up big time. I'll fix it this weekend.
The other thing is that I am still using the cfi power relay for the ecu, which has a 30-second delay built into it, is it possible that the ecu is still firing the injectors after the ignition is switched off?
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EA GL-Ghia pseudo operator
3.9 MPFI converted 4 speed
2.5 inch exhaust
NC Ghia interior (except rear trims)
Fairmont audio (with 4 speakers)
Cruise control
S-pac cluster with white dials
Trip computer and Fairmont interior lighting.
Half wired Ghia BCM.
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