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

1988 firebird formula 5.0 tbi timing issue

Thread Tools
 
Search this Thread
 
Old Oct 11, 2015 | 08:19 AM
  #1  
Randomtask2's Avatar
Thread Starter
Member
15 Year Member
iTrader: (1)
 
Joined: Apr 2007
Posts: 148
Likes: 0
From: Illinois
Car: 1992 Pontiac Firebird Formula
Engine: 5.0 305 tpi
Transmission: T5 (5 Speed) lol
Axle/Gears: stock posi
1988 firebird formula 5.0 tbi timing issue

So I had to replace the distributor in it. And upon putting the new distributor in I hand cranked the engine over to cylinder 1 on the compression stroke. Timed it with what the engine liked, advanced it quite a lot until it is most responsive. It runs very nice.But the downside. Now it idle surges till it dies out. And upon hard acceleration. Makes a rattling noise now. Don't lf it's spark knock. I've never heard spark knock before.Never had any running issues prior. So I don't have a ton of experience with Timing. Distributors were on the way out as I went to college. So would anyone have any idea. Is this a form of spark knock. Because I am running 87 octane. I would hate to turn the timing down because it's running so go good and responsive. And it's advanced quite past the timing spec. So if anyone has any information. It would help greatly.
Reply
Old Oct 11, 2015 | 08:45 AM
  #2  
Johnny Gun's Avatar
Member
 
Joined: Oct 2015
Posts: 145
Likes: 12
From: The Peach State
Car: '88 GTA
Engine: 355 SBC, AFR 195 heads, Stealth Ram
Transmission: 700r4
Re: 1988 firebird formula 5.0 tbi timing issue

Did you mark the direction the button was pointing when you removed the dizzy?
Reply
Old Oct 11, 2015 | 08:49 AM
  #3  
Randomtask2's Avatar
Thread Starter
Member
15 Year Member
iTrader: (1)
 
Joined: Apr 2007
Posts: 148
Likes: 0
From: Illinois
Car: 1992 Pontiac Firebird Formula
Engine: 5.0 305 tpi
Transmission: T5 (5 Speed) lol
Axle/Gears: stock posi
Re: 1988 firebird formula 5.0 tbi timing issue

Originally Posted by Johnny Gun
Did you mark the direction the button was pointing when you removed the dizzy?
Your talking about the position of the rotor? Yes I couldn't get it to line up where the old rotor was at. It was a 1/4 position off where the rotor originally was with the new distrubutor. That's why I positioned it at cylinder number 1 on the compression stroke. Because I knew the timing would be off.
Reply
Old Oct 11, 2015 | 08:50 AM
  #4  
Randomtask2's Avatar
Thread Starter
Member
15 Year Member
iTrader: (1)
 
Joined: Apr 2007
Posts: 148
Likes: 0
From: Illinois
Car: 1992 Pontiac Firebird Formula
Engine: 5.0 305 tpi
Transmission: T5 (5 Speed) lol
Axle/Gears: stock posi
Re: 1988 firebird formula 5.0 tbi timing issue

Originally Posted by Randomtask2
Your talking about the position of the rotor? Yes I couldn't get it to line up where the old rotor was at. It was a 1/4 position off where the rotor originally was with the new distrubutor. That's why I positioned it at cylinder number 1 on the compression stroke. Because I knew the timing would be off.
But I don't believe the timing is off with how good it's running. That's what's so confusing. I could have the timing too advanced. I'm not sure.
Reply
Old Oct 11, 2015 | 02:21 PM
  #5  
antares57's Avatar
Senior Member
10 Year Member
iTrader: (8)
 
Joined: Aug 2011
Posts: 661
Likes: 7
From: Texas
Car: 91 Firebird/88 Firebird/91 Formula
Engine: V6 3.1/V8 5.0/V8 5.0
Transmission: 4L60/700R4/4L60
Axle/Gears: 3.23/2.73/2.73
Re: 1988 firebird formula 5.0 tbi timing issue

Did you disconnect the EST wire before setting your timing, clear the code, and then restart?
Reply
Old Oct 11, 2015 | 02:46 PM
  #6  
Randomtask2's Avatar
Thread Starter
Member
15 Year Member
iTrader: (1)
 
Joined: Apr 2007
Posts: 148
Likes: 0
From: Illinois
Car: 1992 Pontiac Firebird Formula
Engine: 5.0 305 tpi
Transmission: T5 (5 Speed) lol
Axle/Gears: stock posi
Re: 1988 firebird formula 5.0 tbi timing issue

Originally Posted by antares57
Did you disconnect the EST wire before setting your timing, clear the code, and then restart?
No I didn't. I had both connectors plugged back in the back of the distrubutor. Any info for me. On how to proceed from here.
Reply
Old Oct 11, 2015 | 05:58 PM
  #7  
antares57's Avatar
Senior Member
10 Year Member
iTrader: (8)
 
Joined: Aug 2011
Posts: 661
Likes: 7
From: Texas
Car: 91 Firebird/88 Firebird/91 Formula
Engine: V6 3.1/V8 5.0/V8 5.0
Transmission: 4L60/700R4/4L60
Axle/Gears: 3.23/2.73/2.73
Re: 1988 firebird formula 5.0 tbi timing issue

Look at response #5 on this thread.

https://www.thirdgen.org/forums/tbi/...lp-timing.html
Reply
Old Oct 11, 2015 | 08:07 PM
  #8  
Randomtask2's Avatar
Thread Starter
Member
15 Year Member
iTrader: (1)
 
Joined: Apr 2007
Posts: 148
Likes: 0
From: Illinois
Car: 1992 Pontiac Firebird Formula
Engine: 5.0 305 tpi
Transmission: T5 (5 Speed) lol
Axle/Gears: stock posi
Re: 1988 firebird formula 5.0 tbi timing issue

Originally Posted by antares57
Look at response #5 on this thread.

https://www.thirdgen.org/forums/tbi/...lp-timing.html
The last car I timed was a olds rocket 350. I'm out of the loop. Well hopefully because I didn't do that Initially. It will work just fine. Thank you for real. Learn from my mistakes. Lol I will let you know how it goes.
Reply
Old Oct 16, 2015 | 04:06 PM
  #9  
Randomtask2's Avatar
Thread Starter
Member
15 Year Member
iTrader: (1)
 
Joined: Apr 2007
Posts: 148
Likes: 0
From: Illinois
Car: 1992 Pontiac Firebird Formula
Engine: 5.0 305 tpi
Transmission: T5 (5 Speed) lol
Axle/Gears: stock posi
Re: 1988 firebird formula 5.0 tbi timing issue

Originally Posted by antares57
Look at response #5 on this thread.

https://www.thirdgen.org/forums/tbi/...lp-timing.html
Your not going to belive the resolution to the situation. My egr valve that's brand new stopped working. Once I unplugged it and blocked it off the idle no longer spikes. And I followed his instruction. And it worked just fine. She's running tip top supreme. Thank you for your reccomendation to look at the previous thread.
Reply
Old Oct 16, 2015 | 07:13 PM
  #10  
antares57's Avatar
Senior Member
10 Year Member
iTrader: (8)
 
Joined: Aug 2011
Posts: 661
Likes: 7
From: Texas
Car: 91 Firebird/88 Firebird/91 Formula
Engine: V6 3.1/V8 5.0/V8 5.0
Transmission: 4L60/700R4/4L60
Axle/Gears: 3.23/2.73/2.73
Re: 1988 firebird formula 5.0 tbi timing issue

Good to hear it, enjoy!
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
bbsr72
TPI
3
Apr 2, 2016 09:12 AM
Damon
Tech / General Engine
8
Sep 26, 2015 04:29 PM
wstephan96
Tech / General Engine
0
Sep 25, 2015 04:28 PM
steimel94
Cooling
12
Sep 23, 2015 12:48 AM
MartinD
TBI
1
Sep 22, 2015 02:27 PM




All times are GMT -5. The time now is 07:03 AM.