No timing advance
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Junior Member
Joined: Feb 2002
Posts: 60
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From: Owasso, OK
No timing advance
Hey Guys....I installed a 350HO330 crate engine with the Scoggin Dickey TPI Vortec Baseplate and do not have "timing advance." Everyone said it was my MAP sensor then the others said i don't have a MAP, that the MAF replaced the MAP. Then others indicated the MAP replaced the MAF and that the MAP is for speed density '90-91....Shewee. At any rate. "I don't have timing advance." How does this all work? Where do I begin trouble shooting? ....BTW; the 350 replaced the 305 TPI
Stan
Stan
Member
Joined: Oct 2000
Posts: 405
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From: Gulf Coast
Car: 1988 Trans Am GTA
Engine: 5.0 TPI
Transmission: TH700-R4
Axle/Gears: 3.27
Stan,
First, the MAF was used on TPI engines from 1985-1989; the MAP sensor (Speed Density) was from 1990-1992
Did yo get a "Trouble Code"? Have you double checked all connections at the EST Module, Ignition Module and Coil? Also check the "ECM/IGN" fuse.
First, the MAF was used on TPI engines from 1985-1989; the MAP sensor (Speed Density) was from 1990-1992
Did yo get a "Trouble Code"? Have you double checked all connections at the EST Module, Ignition Module and Coil? Also check the "ECM/IGN" fuse.
Thread Starter
Junior Member
Joined: Feb 2002
Posts: 60
Likes: 0
From: Owasso, OK
Thanks for the response Ozzy:
I've checked connections at every place except the ignition module...not sure where it would be...I sure need a book on this thing...ALL DATA reference book indicated, due to reading "not reading" as displayed on the scanner that i needed to check the ECS C terminal and that if it was below 2 volts "replace ECM." It was .05 volts. I replaced the ECM but still have the problem. The quick connect wire on the passenger side which is disconnected to time then reconnected, doesn't work right either. Car will run with it disconnected but when connected she just coughs like timing is advanced beyond recognition and won't start...I wonder if it is the prom? going from a 305 to 350????
Stan
I've checked connections at every place except the ignition module...not sure where it would be...I sure need a book on this thing...ALL DATA reference book indicated, due to reading "not reading" as displayed on the scanner that i needed to check the ECS C terminal and that if it was below 2 volts "replace ECM." It was .05 volts. I replaced the ECM but still have the problem. The quick connect wire on the passenger side which is disconnected to time then reconnected, doesn't work right either. Car will run with it disconnected but when connected she just coughs like timing is advanced beyond recognition and won't start...I wonder if it is the prom? going from a 305 to 350????
Stan
Member
Joined: Oct 2000
Posts: 405
Likes: 0
From: Gulf Coast
Car: 1988 Trans Am GTA
Engine: 5.0 TPI
Transmission: TH700-R4
Axle/Gears: 3.27
Speaking of books, I just recently bought the TPI Swappers Guide. I'm pretty sure you have seen it in catalogs. I got mine from Barnes & Noble and it has an excellent section on troubleshooting every code on the TPI. It will show you step by step and with electrical diagrams too.
Good luck,
Ozzy
Good luck,
Ozzy
Member
Joined: Sep 2001
Posts: 165
Likes: 0
From: Staten Island NY USA
Car: Black on Black 1989 GTA
Engine: 5.7L Vortec TPi
Transmission: 6 Speed T56
Axle/Gears: 3:73
I have a simmilar problem with my 350 Vortec TPi......except that my car wont run at all with the EST Connector disconnected? Are these problems related to the same cause? This problem has been driving me crazy for a while. Any Help greatly Appreciated.
Keith
GTA350FNC@AOL.COM
1989 GTA
Vortec 5.7 Tpi
Vortec TPi intake
MSD 6AL w/ stock distributor, MSD Cap Rotor and wires. Stock IGN Mod
Hedman Shorty Headers
EGR Delete/No Cats
K&N Air Filter
Keith
GTA350FNC@AOL.COM
1989 GTA
Vortec 5.7 Tpi
Vortec TPi intake
MSD 6AL w/ stock distributor, MSD Cap Rotor and wires. Stock IGN Mod
Hedman Shorty Headers
EGR Delete/No Cats
K&N Air Filter
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