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3800 fiero will not start by fierofan25
Started on: 03-16-2014 05:45 PM
Replies: 9 (196 views)
Last post by: fierofan25 on 03-18-2014 06:32 PM
fierofan25
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Report this Post03-16-2014 05:45 PM Click Here to See the Profile for fierofan25Click Here to Email fierofan25Send a Private Message to fierofan25Edit/Delete MessageReply w/QuoteDirect Link to This Post
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).]

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Report this Post03-16-2014 06:33 PM Click Here to See the Profile for FIEROFLYERSend a Private Message to FIEROFLYEREdit/Delete MessageReply w/QuoteDirect Link to This Post
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
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nosrac
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Report this Post03-16-2014 06:53 PM Click Here to See the Profile for nosracSend a Private Message to nosracEdit/Delete MessageReply w/QuoteDirect Link to This Post
check your ICM ground and coil packs.

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

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Darth Fiero
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Report this Post03-16-2014 07:24 PM Click Here to See the Profile for Darth FieroClick Here to visit Darth Fiero's HomePageClick Here to Email Darth FieroSend a Private Message to Darth FieroEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
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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jsmorter
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Report this Post03-17-2014 11:51 AM Click Here to See the Profile for jsmorterClick Here to Email jsmorterSend a Private Message to jsmorterEdit/Delete MessageReply w/QuoteDirect Link to This Post
usually if the crank sensor is bad it will not fire at all
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Justinbart
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Report this Post03-17-2014 12:58 PM Click Here to See the Profile for JustinbartSend a Private Message to JustinbartEdit/Delete MessageReply w/QuoteDirect Link to This Post
Unplug the fuel pump relay and try to start it on starting fluid.

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fierofan25
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Report this Post03-17-2014 07:12 PM Click Here to See the Profile for fierofan25Click Here to Email fierofan25Send a Private Message to fierofan25Edit/Delete MessageReply w/QuoteDirect Link to This Post
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
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hercimer01
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Report this Post03-17-2014 08:56 PM Click Here to See the Profile for hercimer01Send a Private Message to hercimer01Edit/Delete MessageReply w/QuoteDirect Link to This Post
Clean your MAF. Try that.

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Darth Fiero
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Report this Post03-18-2014 01:13 PM Click Here to See the Profile for Darth FieroClick Here to visit Darth Fiero's HomePageClick Here to Email Darth FieroSend a Private Message to Darth FieroEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
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.

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fierofan25
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Report this Post03-18-2014 06:32 PM Click Here to See the Profile for fierofan25Click Here to Email fierofan25Send a Private Message to fierofan25Edit/Delete MessageReply w/QuoteDirect Link to This Post
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.
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