Speedometer not working. 7730 engine harness swap problems.
06-03-2006, 11:21 AM
#1
Senior Member
Thread Starter
iTrader: (2)
Join Date: May 2005
Location: Baltimore, MD
Posts: 841
Likes: 0
Received 0 Likes
on
0 Posts
Car: 09 Cobalt SS Sedan. 92 Z28 vert
Engine: 2.0T EFR6758; 5.0TT T3/T4 8psi
Transmission: F40; 700r4
Axle/Gears: 3.76 LSD; 3.23 posi
Speedometer not working. 7730 engine harness swap problems.
My car had a TBI engine from the factory. When I replaced the engine harness with a TPI harness and a 7730 ($58 chip) the speedometer no longer works. I have a new speed sensor for a manual transmission. I tried both magnetic and optical VSS flags in the chip. Could it be the wrong VSS? Can someone recommend a part number for the correct one? or is there a wire that doesn't hook up properly to the TBI dash from the TPI engine harness.
Also, my oil pressure gauge doesn't work anymore. It always reads max oil pressure (past 60psi). Its a factory replacement sender for a TBI.
I don't think the SES light is working either because it doesn't light up when I turn the key to on, but not start the car (no ref pulse).
They all worked fine before I switched over. The car was originally an automatic. The 7730 harness is from an automatic. My car is a 92 camaro. the TPI engine harness was from a 91 transam.
Thanks in advance
Also, my oil pressure gauge doesn't work anymore. It always reads max oil pressure (past 60psi). Its a factory replacement sender for a TBI.
I don't think the SES light is working either because it doesn't light up when I turn the key to on, but not start the car (no ref pulse).
They all worked fine before I switched over. The car was originally an automatic. The 7730 harness is from an automatic. My car is a 92 camaro. the TPI engine harness was from a 91 transam.
Thanks in advance
06-03-2006, 12:46 PM
#3
Supreme Member
iTrader: (7)
Join Date: Mar 2000
Location: Orange, CA
Posts: 5,677
Likes: 0
Received 112 Likes
on
67 Posts
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Did you remove the speed buffer?
And connect the brown wire to the ECM?
And connect the brown wire to the ECM?
06-03-2006, 01:38 PM
#4
Senior Member
Thread Starter
iTrader: (2)
Join Date: May 2005
Location: Baltimore, MD
Posts: 841
Likes: 0
Received 0 Likes
on
0 Posts
Car: 09 Cobalt SS Sedan. 92 Z28 vert
Engine: 2.0T EFR6758; 5.0TT T3/T4 8psi
Transmission: F40; 700r4
Axle/Gears: 3.76 LSD; 3.23 posi
What is the C100? Is that the clear one the goes toward the driverside near the ecm connectors? How should they be pinned?
No, I'd never heard of that. I must have missed that in the stickies.
Which pin do I connect the brown wire?
If I've missed an entire post on this please help me find the link.
Originally Posted by Dyno Don
Did you remove the speed buffer?
And connect the brown wire to the ECM?
And connect the brown wire to the ECM?
Which pin do I connect the brown wire?
If I've missed an entire post on this please help me find the link.
Last edited by ttypecamaro; 06-03-2006 at 01:41 PM.
Thread
Thread Starter
Forum
Replies
Last Post
