injectors are dumping fuel into engine

[acebrooks44]

Ok, I just replace the caps on the ecu of 91 awd talon. This is an auto car with a 14b with 450 inj and no fuel control. The car is pretty much stock right now, but after I replaced the caps I put it in and it ran right. The very next day I went out to check to see if my trans front pump was moving any fluid and the car would not start. I checked all the plugs for fire and all are firing correctly, I then pulled the fuel rail out and hooked it back up with it laying on top of the motor so I could see if the injectors were pulsing fuel into the motor. I turned the car over and it tried to crank and the injectors justr started blowing fuel every where. I have done this before on one that operating correctly and mine was shooting way more fuel out. The car is just dumping gas into it. I am lost now. Could the fuel pump relay be bad? What else could cause the car to pur gas out like that?

 

[BUCK]

When I bought mine it did the same thing - don't be surprised if your crankcase fills with gas if you spin it very long - I thought the same as you did but it DEFINITELY was the ECU ($400 for a rebuilt) - Months later I wrung a Timing Belt at the crank, When I pulled the Head the Number 1 rod was bent like a banana (it ran great). I still think the rod was bent from trying to compress gasoline - SO BEWARE & Good Luck.

 

[GTM]

Originally posted by BUCK
...
Months later I wrung a Timing Belt at the crank, When I pulled the Head the Number 1 rod was bent like a banana (it ran great). I still think the rod was bent from trying to compress gasoline - SO BEWARE & Good Luck.

Hi Buck:
I've seen a lot of engines that have hydraulic locked to the point you had to either pull the plug or press down on the exhaust valve so it won't seat just to get it to turn over. I won't say it can't happen but the starter probably isn't that strong. Maybe 2(?) hp wound out, wheras with the cylinder full it could only get less than 1/2 turn. On the exhaust stroke most of the liquid would be expelled but then the next 3 cylrs could fire before trying to compress the air and gas. I would also think you would notice a most pronounced vibration, increased gasoline consumption for the other 3 are having to do extra duty to go the same speed. You should have seen wear marks and other evidence on piston and cylinder indicating the piston wasn't coming all the way to the top. The spark plug would need to be hotter since the compression was lower. I'm not saying it didn't happen, just a lot of reasons to believe it was the valve turning sideways, getting trapped with another valve and can't close.

How did the Crankshaft fair after taking that punishment? I've seen them broken or bent so even with a new piston and rod they did not come to the top and were relegated to the scrap pile.

Cheers,
GTM

 

[BUCK]

Crank looked great - bore & even the piston were within factory spec but I changed out all rods & pistons as #3 rod looked funny too - I'm didn't want to have old pistons pressed on new rods & then have 2 new & 2 old rods.