After 2 days at a park and ride where I pushed my 84 4 cyl 1/2 a mile, I towed the thing home this afternoon having to lose a day of no pay at work(no more personal days or vacation) I need some help, Thing died on me on my way home just stalled. been researching it, checking things... code 12, no fuel being shot out of the injector... haven't gotten out the electrical test equiptment until tommorrow morning, but anybody have this happen? I switched coils to see if it was that, didn't start. maybe both are bad, new cap and rotor, no start. pulling hair out, maybe bad ECM? book says to check voltage to injector, yet to do that...
Check the easy to diagnos stuff first, like the fuel pump and fuel filter.
The fuel pump should operate for about 2 seconds when the key is turned on. Don't try to start the Fiero, just turn the key to see if the fuel pump kicks in.
If you don't hear it, check the fuel pump fuse (it is the number 2 fuse in the block - top row second from left, it is a 10 amp fuse). If the fuse is ok, but no fuel pump operation, the pump is bad, drop the tank, replace the pump, problem solved.
If the fuse is good and the fuel pump is good, replace the fuel filter if it has not been done.
If that does not solve it, there is something else at work.
Good Luck.
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11:27 PM
Jan 26th, 2002
Fierowrecker Member
Posts: 1858 From: Lowell, MI. USA Registered: Mar 2001
First, start with the basics. Check and make sure you are getting spark--take a plug and connect one of the ignition wires to it, lay it on the engine to ground it and have a friend turn the engine over. If no spark, take the distributer cap off and make sure the rotor is turning while the engine is cranked. (No rotor turning=blown timing gear) If you're getting spark, try removing the top of the air cleaner and have a friend crank the engine. You should see some fuel spray from the injector, if not, you either have a fuel pump issue or a problem with the injector or the wiring/ECM. Hope this helps
------------------ Rod Schneider, Woodstock, Ga. White 88 GT :)
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07:58 AM
Return of Fiero Member
Posts: 197 From: Nashua,NH,USA Registered: Oct 2001
Originally posted by Fierowrecker: Hey Back! I had the same thing happen... Turned out to be the ECM... Hopefully, you have a less expensive repair! crash...
less expencive? how much did it cost you? mine cost me $25 from the bone yard, and then I changed the prom, poped it in and was off and running. that was on an 88'
Myke
edited due to smiles not working
[This message has been edited by Return of Fiero (edited 01-26-2002).]
No Spark? NO Fuel thru injector but fuel up to the throttle body? Check the ignition module.When it works properly it sends pulses to the ecm to trigger the fuel injection and the ignition.It could also be the pick up coil in the distributor.Let me know,I'll help you thru it. Dan
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08:31 AM
Back On Holiday Member
Posts: 6238 From: Downingtown, PA Registered: Jul 2001
Originally posted by Rodrv6: First, start with the basics. Check and make sure you are getting spark--take a plug and connect one of the ignition wires to it, lay it on the engine to ground it and have a friend turn the engine over. If no spark, take the distributer cap off and make sure the rotor is turning while the engine is cranked. (No rotor turning=blown timing gear) If you're getting spark, try removing the top of the air cleaner and have a friend crank the engine. You should see some fuel spray from the injector, if not, you either have a fuel pump issue or a problem with the injector or the wiring/ECM. Hope this helps
First and formost, I'd like to thank all of you for your help. Fuel pump and filter fine, good pressure, read through the GM book...almost worthless, Rodrv6 I believe you hit it right on the money, took your advice and pulled the cap...had the wife crank it...no rotor movement, called dad...said pull the cover on the oilpump which is located above and to the left of the oil filter, and pulled the bering out to watch the pump gear turn when the wife turned the car over, no movement... timing gear shot? cause the cam should turn the distributer and the oil pump...
draining oil tonight, pulling pan tomorrow morning. Any EASY suggestions on a new Gear installation without having to take the cam out and take to a shop? Thank you!
Gee, all the cam gears must be getting to the end of their service life! There have been several threads lately concerning the different ways to change the gear. A search will probably yield a lot of info. Whenever I've changed one, I went ahead and dropped the engine and took the cam completly out. There is a way to do it while leaving the engine in the car that involves drilling some holes in the metal core of the cam gear and tapping them and using a puller to remove the gear. Then the center of the cam will need to be drilled and tapped in order to pull the new gear on with a bolt arrangement. I've never tried that method, but others here have and seem to like it. I would highly recommend using a set of all metal gears for the replacement and doing away with the fiber cam gear. I did that on my 84 and couldn't tell any difference in noise and the gears should last forever. Have fun
------------------ Rod Schneider, Woodstock, Ga. White 88 GT :)
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10:19 PM
Back On Holiday Member
Posts: 6238 From: Downingtown, PA Registered: Jul 2001
Originally posted by Rodrv6: Gee, all the cam gears must be getting to the end of their service life! There have been several threads lately concerning the different ways to change the gear. A search will probably yield a lot of info. Whenever I've changed one, I went ahead and dropped the engine and took the cam completly out. There is a way to do it while leaving the engine in the car that involves drilling some holes in the metal core of the cam gear and tapping them and using a puller to remove the gear. Then the center of the cam will need to be drilled and tapped in order to pull the new gear on with a bolt arrangement. I've never tried that method, but others here have and seem to like it. I would highly recommend using a set of all metal gears for the replacement and doing away with the fiber cam gear. I did that on my 84 and couldn't tell any difference in noise and the gears should last forever. Have fun
Again, Thank you. Pointing me in the right direction saved me alot of time. the GM book mentions only electrical fixes and problems... seems to me that if theres a mechanical malfunction, the electronics wouldn't work right
