Possible ECM problem
Possible ECM problem
So I just bought a 1986 Trans Am, VIN H, so it has the 305 and the CCQJet.
The car will start up and run but has no power and coughs and sputters when I press on the gas. Bought it thinking it was a simple carb rebuild, was unaware of the computer controlled aspect of it.
So I tried to pull the codes to get a start on the problem but jumping the 2 pins on the diagnostic port under the dash does nothing. SES light is on, but it won't even flash the 12 its supposed to.
Where can I start?
The car will start up and run but has no power and coughs and sputters when I press on the gas. Bought it thinking it was a simple carb rebuild, was unaware of the computer controlled aspect of it.
So I tried to pull the codes to get a start on the problem but jumping the 2 pins on the diagnostic port under the dash does nothing. SES light is on, but it won't even flash the 12 its supposed to.
Where can I start?
Re: Possible ECM problem
FSM? Not sure what that is.
Its not flashing at all, turn the key and its on solid. There are a few loose connectors under the hood I'm trying to figure out. How much does the ecm actually control on these cars?
Its not flashing at all, turn the key and its on solid. There are a few loose connectors under the hood I'm trying to figure out. How much does the ecm actually control on these cars?
Re: Possible ECM problem
FSM = Factory Shop Manual. Find one on eBay...
Re: Possible ECM problem
Yeah - it's good enough, IF it had a round hollow binding, to hang in the 'Library', where the seat has a BIG hole in the middle.
Tear a page, read, wipe, flush. Repeat if necessary.
'Krinkle', between 'read, and 'wipe', if you're tender in the hindquarters

ed.:
and it's good enough, regardless of your 'style' - front to rear, rear to front, sideways, pinch, blot, swirlie, etc.,
Last edited by Schrade; Aug 8, 2013 at 03:49 PM.
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Re: Possible ECM problem
Harsh, so before I go dropping $50-$100 on this manual, is it going to have all the right wiring and vacuum diagrams so I can figure out the cluster of wires under the hood?
Is this what I'm looking for?
http://www.ebay.com/itm/1986-Pontiac-Firebird-Factory-Shop-Service-Manual-/151092338350?pt=Motors_Manuals_Literature&hash=item232dce1eae&vxp=mtr
Is this what I'm looking for?
http://www.ebay.com/itm/1986-Pontiac-Firebird-Factory-Shop-Service-Manual-/151092338350?pt=Motors_Manuals_Literature&hash=item232dce1eae&vxp=mtr
Re: Possible ECM problem
Harsh, so before I go dropping $50-$100 on this manual, is it going to have all the right wiring and vacuum diagrams so I can figure out the cluster of wires under the hood?
Is this what I'm looking for?
1986 Pontiac Firebird Factory Shop Service Manual | eBay
Is this what I'm looking for?
1986 Pontiac Firebird Factory Shop Service Manual | eBay
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Possible ECM problem
Check for a Cd version of the FSM ; cheaper and you can just print out what pages you need and not get the FSM dirty
http://www.ebay.com/itm/1987-Chevrolet-Camaro-Mechanic-Workshop-Service-Repair-Manual-CD-Factory-Guide-/370783160552?pt=Motors_Manuals_Literature&hash=item56546608e8&vxp=mtr
vac drawing are in the main mech section.
You need to find out if the Electrical component for your year was part of the main FSM or a separate supplement like it was on the later years
Exp
http://www.ebay.com/itm/1987-Camaro-Factory-Service-Manual-Electrical-Supp-/251313885955?pt=Motors_Manuals_Literature&hash=item3a83799303&vxp=mtr
http://www.ebay.com/itm/1987-Chevrolet-Camaro-Mechanic-Workshop-Service-Repair-Manual-CD-Factory-Guide-/370783160552?pt=Motors_Manuals_Literature&hash=item56546608e8&vxp=mtr
vac drawing are in the main mech section.
You need to find out if the Electrical component for your year was part of the main FSM or a separate supplement like it was on the later years
Exp
http://www.ebay.com/itm/1987-Camaro-Factory-Service-Manual-Electrical-Supp-/251313885955?pt=Motors_Manuals_Literature&hash=item3a83799303&vxp=mtr
Joined: Dec 2012
Posts: 407
Likes: 10
From: Clarksville,TN
Car: 1989 GTA
Engine: 5.7 w/Paxton
Transmission: 700R4
Axle/Gears: 3.27
Re: Possible ECM problem
FSM is the way to go. Got one for my car today. Other books don't ID relays properly and recycle wiring harness diagrams....I just don't trust them anymore. Not even the torque specs.
PS do some searching for an 88 Firebird service manual here at thirdgen. it is a pdf...about 100mb DL.
PS do some searching for an 88 Firebird service manual here at thirdgen. it is a pdf...about 100mb DL.
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