I have a 3800 fiero and it was running ok and then just died and now it will roll over and then try to start but will not. It will backfire a little too. Replaced the ignition control module and it have 70 psi fuel pressure. I am thinking crankshaft sensor but not sure. Thanks

[This message has been edited by fierofan25 (edited 03-16-2014).]

Any codes and I would also agree on the crank sensor, did you check for proper spark. Also check the pins on the crank sensor and the connector for it I have seen the pins bent or the connector pins pushed back in before killing the engine. Dan

check your ICM ground and coil packs.

[This message has been edited by nosrac (edited 03-16-2014).]

quote Originally posted by fierofan25: I have a 3800 fiero and it was running ok and then just died and now it will roll over and then try to start but will not. It will backfire a little too. Replaced the ignition control module and it have 70 psi fuel pressure. I am thinking crankshaft sensor but not sure. Thanks

70 psi of fuel pressure is too much. Stock spec is 50psi static (no vac / no boost acting on regulator).

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OVERKILL IS UNDERRATED

Custom GM OBD1 & OBD2 Tuning | Engine Conversions & more | www.gmtuners.com

usually if the crank sensor is bad it will not fire at all

Unplug the fuel pump relay and try to start it on starting fluid.

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Turbo 3800 E85 F23 5spd spec5
10.91@133.1

I Went out and adjusted the fuel pressure to 50 psi and it started,but run awful and then died and would not restart. So I pulled all the spark plugs and they were soaked with fuel. Also when all this started I thought it ran out of gas so I pushed on the fuel pressure valve { the one you hook the fuel pressure tester to} and very little fuel came out. So I got some fuel and then it would not restart. could I have gotten some bad gas. I put some in a glass jar and it looks ok . Thanks

Clean your MAF. Try that.

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Project Genisis Lo Budget 3800SC swap
13.104 @ 101.45 MPH 3" exhaust, 3.4 pulley, ZZP tune and 18 year old tires.

88 Coupe under construction

quote Originally posted by fierofan25: So I pulled all the spark plugs and they were soaked with fuel.

I would recommend installing new spark plugs at this point. I've run into a few instances in the past where I've had spark plugs get fouled with gas, and no matter how well I cleaned them, the engine never ran right until I put a fresh (new) set of spark plugs in.

Installed a new set of spark plugs and it fired up first try, but was hunting for idle. So installed another IAC that I had and it runs great now. Thanks Guys for the help.