Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by:
Sponsored by: CARiD

Timing / Surging Issues.

Old Jun 29, 2005 | 11:12 PM
  #1  
mike1986fyrbird's Avatar
Thread Starter
Supreme Member
 
Joined: Feb 2002
Posts: 1,036
Likes: 0
From: Prince Albert, Saskatchewan, Canada
Car: 1987 Trans Am GTA
Engine: 357ci Stealth Ram - Under Pressure
Transmission: Built 700r4/Pro Yank 3400 Extreme
Axle/Gears: 9-Bolt 3.27
Timing / Surging Issues.

Hey
Recently installed the Holley stealth ram.

I put the distributor back in the original position - heres the catch.

It wont idle right at all at 6*BTDC. The idle surges quite a bit and stalled if I put it in gear and creep foward.
If I put the timing at 2* (after TDC?) which is 8 degrees retarded from where it should be. It idles/runs fine quite beter but still has a slight surge..

No vacuume leaks, adjusted the TPS and cleaned the IAC passage real good when it was off the car.
New IAC Valve.

I did this all with the timing advance (tan) wire taken off.
Fuel pressure is set to 50psi with the Vacuum line off.
Any ideas?

___________
Reply
Old Jun 30, 2005 | 03:40 AM
  #2  
jasman19's Avatar
Member
 
Joined: Nov 2001
Posts: 205
Likes: 0
From: Vancouver, Wa
Car: RED 1986 IROC-Z28
Engine: 350 5.7L
Transmission: TH 700R4
Axle/Gears: 3.23 10 Bolt
Only time I had a problem similiar to what you have is when I had a vacuum leak. I would double check for this because it really sounds like you have one.
Reply
Old Jun 30, 2005 | 08:24 AM
  #3  
mike1986fyrbird's Avatar
Thread Starter
Supreme Member
 
Joined: Feb 2002
Posts: 1,036
Likes: 0
From: Prince Albert, Saskatchewan, Canada
Car: 1987 Trans Am GTA
Engine: 357ci Stealth Ram - Under Pressure
Transmission: Built 700r4/Pro Yank 3400 Extreme
Axle/Gears: 9-Bolt 3.27
alright, i'll check that out.
I used a propane torch to look for leaks, anything else I can use?
Reply
Old Jun 30, 2005 | 08:40 AM
  #4  
jasman19's Avatar
Member
 
Joined: Nov 2001
Posts: 205
Likes: 0
From: Vancouver, Wa
Car: RED 1986 IROC-Z28
Engine: 350 5.7L
Transmission: TH 700R4
Axle/Gears: 3.23 10 Bolt
I've never used a propane torch before, normally I use carb cleaner. Just spray it around the gasket area and listen for a surge.
Reply
Old Jun 30, 2005 | 06:24 PM
  #5  
mike1986fyrbird's Avatar
Thread Starter
Supreme Member
 
Joined: Feb 2002
Posts: 1,036
Likes: 0
From: Prince Albert, Saskatchewan, Canada
Car: 1987 Trans Am GTA
Engine: 357ci Stealth Ram - Under Pressure
Transmission: Built 700r4/Pro Yank 3400 Extreme
Axle/Gears: 9-Bolt 3.27
Just confirmed no vacuum leaks.
Car pulls 19" at idle and I cant find any leaks.
Reply
Old Jun 30, 2005 | 10:31 PM
  #6  
del91_305's Avatar
Supreme Member
 
Joined: Dec 2002
Posts: 1,101
Likes: 0
From: Kingsport,tn
Car: 1991 camaro RS
Engine: 305 Carb
Transmission: 700R4
I would check your EGR, mine was doing the same thing and thats what caused it
Reply
Old Jun 30, 2005 | 10:57 PM
  #7  
mike1986fyrbird's Avatar
Thread Starter
Supreme Member
 
Joined: Feb 2002
Posts: 1,036
Likes: 0
From: Prince Albert, Saskatchewan, Canada
Car: 1987 Trans Am GTA
Engine: 357ci Stealth Ram - Under Pressure
Transmission: Built 700r4/Pro Yank 3400 Extreme
Axle/Gears: 9-Bolt 3.27
The Holley steath ram intake doesnt have egr.
Reply
Old Jul 1, 2005 | 04:00 AM
  #8  
jasman19's Avatar
Member
 
Joined: Nov 2001
Posts: 205
Likes: 0
From: Vancouver, Wa
Car: RED 1986 IROC-Z28
Engine: 350 5.7L
Transmission: TH 700R4
Axle/Gears: 3.23 10 Bolt
19 sounds about right, normally if you have a vacuum leak it would be sitting around 15 (with a mild cam). With no leaks it would seem to be the TPS. You said you adjusted it though, I would double check this. I've had problems in the past with a TPS doing what you're describing. Are you throwing any codes?
Reply
Old Jul 1, 2005 | 08:56 AM
  #9  
del91_305's Avatar
Supreme Member
 
Joined: Dec 2002
Posts: 1,101
Likes: 0
From: Kingsport,tn
Car: 1991 camaro RS
Engine: 305 Carb
Transmission: 700R4
The Holley steath ram intake doesnt have egr

Well, i guess it couldnt be that then
Reply
Old Jul 1, 2005 | 12:22 PM
  #10  
mike1986fyrbird's Avatar
Thread Starter
Supreme Member
 
Joined: Feb 2002
Posts: 1,036
Likes: 0
From: Prince Albert, Saskatchewan, Canada
Car: 1987 Trans Am GTA
Engine: 357ci Stealth Ram - Under Pressure
Transmission: Built 700r4/Pro Yank 3400 Extreme
Axle/Gears: 9-Bolt 3.27
Originally posted by jasman19
19 sounds about right, normally if you have a vacuum leak it would be sitting around 15 (with a mild cam). With no leaks it would seem to be the TPS. You said you adjusted it though, I would double check this. I've had problems in the past with a TPS doing what you're describing. Are you throwing any codes?

I set the timing to 6*btdc and set the TPS to .64 volts and it idled a bit beter like it did when it was set at 2*atdc before.

No codes.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
bamaboy0323
Tech / General Engine
25
Sep 3, 2015 06:07 AM
jbd1969
Tech / General Engine
1
Aug 17, 2015 07:06 PM
86White_T/A305
LTX and LSX
0
Aug 17, 2015 12:16 AM


Thread Tools
Search this Thread

All times are GMT -5. The time now is 08:29 PM.