spark + fuel but yet no crank

[srGS-t]

ok I have fuel i have spark......but yet it will not crank. it just trys to turn over......every now and then it will back fire threw the tail pipe or even threw the t-body. im lost i mean i cant think of anything......i changed the starter and i look at the timeing marks and the look to be right on sooo what else could cause this....please help anybody

 

[Fastass96]

How do you know you have fuel on 1995-1999 the crank sensor controls the fuel pump. Pull and push on your crank to see if there is a lot of play. The crank might have walked it might get signal some times and give a little fuel.

 

[gsxbri]

Is your CEL on? If it's on grab your DTC's and see what the ECU thinks. That way if its a sensor problem instead of tearing down the engine you can check connections/replace a bad sensor.

Fastass96, I think I peed my pants when I saw your dyno #'s

 

[srGS-t]

ok i know i have fuel cause i pulled off my fuel line and turned the car over and go a stedy flow of fuel and i changed my crank sensor like 1,000 miles ago......could it be the cam sensor.....please im lost on this

 

[srGS-t]

and there is no CEL on soo i cant check that......is there a way to change the cam sensor with out takeing the whole side of the motor apart

 

[magics5rip]

Just some simple thigs to check:

all plug wires are on the CORRECT plug location
distributer rotor is 180 degrees off (if the car has a distributer)

If you are getting fuel AND spark, this is all I can think of. Only other possibility is that the timing is off.

Hope this helps!

 

[dwc4g63]

I had the same problem after I rebuilt my car..Ended up being a faulty ECU. Is the ECU for your exact year and tranny type? I know this is a long shot but it can't hurt to look into it.

 

[ChicksDigBoost]

Are your injectors are pulsing? They should have 12v on the one pin and should have a switched ground on the other. Check your timing and that all the plug wires are in the right location. I also see that you have ecu+ in your profile check your fuel and timing settings.

 

[srGS-t]

ok i have tried everything.....but....is there a way to check the ecu i mean i have the ecu plus and it shows signal and all but it see what the ecu see before soo it still could be messed up