TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
Sponsored by:
Sponsored by:

TPI starts only when stepping on gas pedal

Thread Tools
 
Search this Thread
 
Old 01-11-2013, 04:40 PM
  #1  
Member
Thread Starter
iTrader: (1)
 
kallark's Avatar
 
Join Date: Aug 2008
Location: New York
Posts: 132
Likes: 0
Received 0 Likes on 0 Posts
Car: 1992 Z28
Engine: 350TPI
Transmission: 700R4 Auto
Axle/Gears: G92
TPI starts only when stepping on gas pedal

I have a 1992 5.7 TPI, everything stock. Changed timing 2 days ago. Car was running fine after that. Today in am could not start. Engine turns but to start and keep running have to keep foot on gas pedal. If take my foot off the gas even after running it for a few minutes, RPMs fall and dies. Hoping its not a fuel pump issue. Pls help. Thanks!
Old 01-11-2013, 04:54 PM
  #2  
Supreme Member

iTrader: (8)
 
fireturd350's Avatar
 
Join Date: Jul 2001
Location: New Boston, IL, USA
Posts: 3,204
Likes: 0
Received 6 Likes on 6 Posts
Car: '90 Formula 350
Engine: 383 SBC
Transmission: ProBuilt S/S 700-R4 & ACT 9" Stall
Axle/Gears: 10 bolt 3.23
Re: TPI starts only when stepping on gas pedal

When you changed the timing how much did you actually change it?

Did it cold start fine after the timing adjustment?

Did you change with anything else (spark plugs, wires, or idle speed)?

Might start by checking IAC and TPS. Instructions are found here: https://www.thirdgen.org/tpimod2 Even if it isn't the issue good idea just for normal check. That was one of the first things I did to my car when I first got it.
Old 01-11-2013, 05:13 PM
  #3  
Supreme Member

iTrader: (8)
 
TTOP350's Avatar
 
Join Date: Oct 2001
Location: Il
Posts: 11,723
Received 771 Likes on 520 Posts
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: TPI starts only when stepping on gas pedal

And did you tighten down the distributor clamp when you set the timing?
Old 01-12-2013, 09:11 AM
  #4  
Member

 
Anti-Venom's Avatar
 
Join Date: Sep 2003
Location: Springfield, IL
Posts: 366
Received 48 Likes on 26 Posts
Car: '89 Formula WS6
Engine: L98
Transmission: 700r4/T56
Axle/Gears: BW 3.23
Re: TPI starts only when stepping on gas pedal

Did you unplug the timing connector when you set it? If not you may have it set wrong. Def sounds like a timing issue to me.
Old 01-12-2013, 09:37 AM
  #5  
Member
Thread Starter
iTrader: (1)
 
kallark's Avatar
 
Join Date: Aug 2008
Location: New York
Posts: 132
Likes: 0
Received 0 Likes on 0 Posts
Car: 1992 Z28
Engine: 350TPI
Transmission: 700R4 Auto
Axle/Gears: G92
Re: TPI starts only when stepping on gas pedal

It did cold start after I adjusted. Drove it for a day. I did not do anything else (plugs, etc). I did tighten distrib. cap. Two mistakes that I made was:
1. I did not unplug the brown wire while adjusting
2. I did not use stroboscope, so not sure to which degree I actually messed it up. I did it by sound (engine running smooth).
Will go and check it now and report back. I hope all it is is timing. Thank you everyon for help.
Old 01-12-2013, 10:16 AM
  #6  
Member
Thread Starter
iTrader: (1)
 
kallark's Avatar
 
Join Date: Aug 2008
Location: New York
Posts: 132
Likes: 0
Received 0 Likes on 0 Posts
Car: 1992 Z28
Engine: 350TPI
Transmission: 700R4 Auto
Axle/Gears: G92
Re: TPI starts only when stepping on gas pedal

I am an idiot. I completely messed up my timing. It was 4 degrees past 0. I set it to factory 6 degree before 0 and car started running like nothing happened. Thank you everyone for your help. Lesson learned, never touch timing without proper tools.
Old 01-12-2013, 10:19 AM
  #7  
Member

 
Anti-Venom's Avatar
 
Join Date: Sep 2003
Location: Springfield, IL
Posts: 366
Received 48 Likes on 26 Posts
Car: '89 Formula WS6
Engine: L98
Transmission: 700r4/T56
Axle/Gears: BW 3.23
Re: TPI starts only when stepping on gas pedal

Proper tools, and the correct processes facilitate only having to do a job once.
Old 01-12-2013, 10:22 AM
  #8  
Member
Thread Starter
iTrader: (1)
 
kallark's Avatar
 
Join Date: Aug 2008
Location: New York
Posts: 132
Likes: 0
Received 0 Likes on 0 Posts
Car: 1992 Z28
Engine: 350TPI
Transmission: 700R4 Auto
Axle/Gears: G92
Re: TPI starts only when stepping on gas pedal

Agreed. I almost had a heart attack, thought it was fuel pump.
Old 01-12-2013, 10:25 AM
  #9  
Member

 
Anti-Venom's Avatar
 
Join Date: Sep 2003
Location: Springfield, IL
Posts: 366
Received 48 Likes on 26 Posts
Car: '89 Formula WS6
Engine: L98
Transmission: 700r4/T56
Axle/Gears: BW 3.23
Re: TPI starts only when stepping on gas pedal

We've all been there before. Glad it was a simple fix.
Old 01-13-2013, 02:29 PM
  #10  
Junior Member

 
bungy74's Avatar
 
Join Date: Jun 2012
Location: Stewartsville, NJ
Posts: 93
Likes: 0
Received 7 Likes on 5 Posts
Car: 1992 Camaro Z28
Engine: 5.0 TPI
Transmission: auto
Re: TPI starts only when stepping on gas pedal

i see that alot, distributor come loose and turns a bit
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
1992 Trans Am
History / Originality
27
05-10-2023 07:19 PM
Sanjay
Engine/Drivetrain/Suspension Parts for Sale
1
08-12-2015 03:41 PM
Bradsaundry
TPI
7
08-12-2015 12:34 AM
Ginamariegault
Brakes
1
08-10-2015 08:33 AM



Quick Reply: TPI starts only when stepping on gas pedal



All times are GMT -5. The time now is 09:59 PM.