What would cause a 2.8 to flood out? I have changed the spark plugs, sp wires,. I am getting spark, but when I try to crank the car, it trys but gets flooded. I can smell gas and when I pulled the plugs, they where soaked. Anyone ever experienced this. What could it be? A sensor maybe? Please help.

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-Chris
85 GT
New Exhaust, No Cat, Flowmaster, Polly mounts, Full Polly Suspension, Intrax 2" drop springs, Sencetrack Struts and Shocks, 17" Gun Metal Wheels, Khumo Tires, Racing Seats, Grant Steering wheel, Carbon Fiber Dash and Shiter.

I am not close to a shop manual to check this on a v6 but I believe (if like in my 4cyl) that one of the temp sensors talks to the ECM. When the sensor is defective or disconnected, the ECM send the wrong amount of fuel. In my car, it wouldn't allow it to start and the smell of raw fuel was strong. Then I discovered the broken connector and replaced the sensor.

Good luck!
Benno

I do have a broken connector and I think it is a temp sensor. Is the other temp sensor under the map sensor in the intake manifold?

Sorry, I didn't log in earlier. I don't have the shop manual here and my car is 4 Cyl. Although I don't know the physical location, there may be info. in the archives.

I do remember that the ECM will receive the info from the "Coolant Temp. Sensor". I also think that failure will set a code 14 or 15 if the ECM gets too high or too low a reading (can't remember which). A broken connector will result in the ECM "perceiving" a radical temp.

Benno

P.S. Edit due to finding this useful thread in archives:
https://www.fiero.nl/forum/Forum2/HTML/044445.html

[This message has been edited by Jdlog (edited 12-15-2003).]

i would check the fuel pressure regulator i had mine wear out then it was sending too much gas .It cause me to have to crank it over for a while and then it would start some thing to check mine was a 86 se v-6

BUMP
I've got the exact same thing going on right now. Any ideas...

Hey everyone, has anyone looked into their cold start injector? The switch may be bad or have some chaffed wires causing the engine to dump to much fuel into the intake. Its not computer controlled so you won't get a check engine light. The only other thing I can think of is fuel pressure regulator, bad injector/s and the coolant temp sensor.

I'm gathering info while out of town for the holiday. I will be looking into: cold start injector switch, cold start injector, ECM temp sensor, fuel press reg, injectors, O2 sensor, & ECM.

I was hoping someone with this problem before could lend some insight. Any help and/or spectulation is appreciated.
Scott

Is only one cylinder flooded? Or are all of them flooded? If only one, then the injector on that cylinder is stuck open or leaking. If all, then one of two likely problems is occuring. One is that the cold start injector is stuck open or leaking. The check for that is to hook up a fuel pressure guage, run the fuel pump by jumping 12v to the pump terminal in the ALDL connector and look at the pressure, turn off the pump and see how fast the pressure drops. if it drops faster than, say, 1 psi per minute then there's a problem. The other likely problem is a faulty ECM coolant temp sensor. If the sensor tells the ECM that the temperature is extremely cold, like -40°F cold, then the ECM goes into super enrichment mode and doubles the amount of fuel going into the engine. The check for this is to floor the throttle and hold it there while cranking. Flooring the throttle triggers the ECM to go into Clear Flood Mode and it will shut off the injectors entirely. If the engine will start but won't run once you release the throttle then the coolant temp sensor is the likely problem.

JazzMan

Thanks Jazz that helps... I didn't know about the Clear Flood Mode. I planned on checking the fuel pressure for bleed down, but forgot about being able to jump the pump via the ALDL. Right now it has an ADS chip in it, but I've got a spare stock ECM I'll put in to check also. (I'm not sure if the ADS chip disables codes or works works in all modes as well as stock. I know it disables the EGR amoung other changes.) I've got spares of everything but injectors that are known to be good, so I hope I can get this figured out quickly.