EFI Flooding

00gyrhed

Bronco Guru

Joined

Aug 3, 2006

Messages

2,428

• Aug 20, 2007

• #1

When I shut off the Bronco when it is hot or if I lug it down and it dies it behaves as though it is flooded. It will not restart immediately unless I hold the pedal down on the floor. No problem with cold starts or if it sits for a while after I have shut it off. This is a recent thing and hasn't always done it.

Am I overlooking something obvious?

The engine is a basically stock '71 302 with 87 Mustang SD EFI, shorty headers and mild RV cam. All pollution control monitoring has been defeated with the appropriate resistors. Other wise the EFI is stock also.

It doesn't run rich.

 

justinoshea

Contributor

Sr. Member

Joined

Feb 16, 2007

Messages

479

Loc.

Gilbert, AZ

• Aug 20, 2007

• #2

00gyrhed said:

It will not restart immediately unless I hold the pedal down on the floor.

Click to expand...

Any codes???

Sounds like it really is flooded, as holding the pedal down disables the injectors. Speed density's fuel control comes from a look up table and a few sensors Look in Probst's book at the crank strategy, then check out those sensors. Maybe the air or coolant temp sensors, as the problem is different under different temp condiditons?

If problem persists, add one beer, and repeat.

 

OP

OP

00gyrhed

Bronco Guru

Joined

Aug 3, 2006

Messages

2,428

• Aug 20, 2007

• #3

no codes.

 

SaddleUp

Bronco Guru

Joined

May 23, 2004

Messages

9,655

Loc.

Vancouver, WA

• Aug 20, 2007

• #4

Try the Idle Air Control valve. Mine had exactly the same symptoms and then finally stuck open with it idling at about 1500 RPM's. Once I swapped the valve it was normal again.

 

OP

OP

00gyrhed

Bronco Guru

Joined

Aug 3, 2006

Messages

2,428

• Aug 21, 2007

• #5

Thats funny, I have other troubles that I am pretty sure are related to a sticky idle air valve. Didn't mention them because I just didn't even think about it. You know, you figure something out then since it doesn't seem important enough to fix right now you move on and forget it.

Thanks I will give it a try this weekend.

 

OP

OP

00gyrhed

Bronco Guru

Joined

Aug 3, 2006

Messages

2,428

• Aug 26, 2007

• #6

If any of you still subscribe to or are watching this thread turns out I somehow missed the 21 code for the ECT sensor. REplaced it yesterday and everything id back to normal. No more flooding at high engine temps, no more hunting idle.

Thanks for the help