Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

1992 Firebird 3.1 L V6. distributor Timing adjustment

Thread Tools
 
Search this Thread
 
Old Jun 29, 2020 | 09:58 PM
  #1  
Jjchamblin's Avatar
Thread Starter
Junior Member
 
Joined: Dec 2017
Posts: 12
Likes: 0
1992 Firebird 3.1 L V6. distributor Timing adjustment

I was having hard starting issues which it would take 6-10 cranks before the car would turn over and start
I replaced all plugs, wires, and fuel filter. Now it takes 1 or 2 cranks to get it started. i found a vacuum leak at the egr valve that i haven't been able to fix yet since i just found it after the parts store closed. Only one of the 3 screw were on the egr valve the one that is there is stripped so i dont know what size it is. Can someone help with the correct size?


Ok so with the timing issue. This is a bit weird for me i dont know if it would be for you all but i put my timing light on and if im not going crazy the timing is so far off i would guess it to be -12 or so. would i even be able to crank it at that point?
Am i reading the timing wrong?

Also my rpm is idling at around 3,000 rpm hoping it goes down when when i screw down the egr valve tomorrow.

I have looked around the distributor and cannot find the bolt that allows me to turn the dizzy for adjusting timing

Can someone help me with this host of problems i have
Reply
Old Jun 30, 2020 | 09:57 AM
  #2  
RBob's Avatar
Moderator
iTrader: (1)
 
Joined: Mar 2002
Posts: 18,432
Likes: 233
From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: 1992 Firebird 3.1 L V6. distributor Timing adjustment

If the timing mark is down on the drivers side past the tab, that would be ATDC. It will crank and start, but the engine won't have any power. The correct timing is 10° BTDC. For the timing light pickup I like to use #4 cylinder, center drivers side. That way no need to drape the cable over the engine to get to #1.

For the distributor bolt, it is toward the rear of the engine skewed to the passenger side. It is a 15 mm head. If your car is an automatic the TV cable likes to pass right over the bolt head.

Can't help with the EGR.

RBob.
Reply
Old Jun 30, 2020 | 10:08 AM
  #3  
Jjchamblin's Avatar
Thread Starter
Junior Member
 
Joined: Dec 2017
Posts: 12
Likes: 0
Re: 1992 Firebird 3.1 L V6. distributor Timing adjustment

When i checked yesterday im saying it appears to be 12 or 14 before top dead center. its far away from the timing tab
Reply
Old Jun 30, 2020 | 11:45 AM
  #4  
RBob's Avatar
Moderator
iTrader: (1)
 
Joined: Mar 2002
Posts: 18,432
Likes: 233
From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: 1992 Firebird 3.1 L V6. distributor Timing adjustment

IIRC, there are other marks/slots on the stock damper. You may be looking at the wrong one. The other possibility is that the damper is failing and the outer ring has moved. This puts the timing mark in the wrong spot, not at TDC.

Here is a picture of the tab with the timing mark at 11° BTDC:



RBob.
Reply
Old Jun 30, 2020 | 12:13 PM
  #5  
OrangeBird's Avatar
Supreme Member
10 Year Member
Liked
Loved
Community Favorite
iTrader: (1)
 
Joined: Feb 2012
Posts: 3,939
Likes: 801
Car: 1989 Firebird
Re: 1992 Firebird 3.1 L V6. distributor Timing adjustment

Two thoughts come to mind here ;

I've seen no mention of disconnecting the connector that puts it into base timing mode , has that been done ?

If yes , do a search for my thread "pics of a slipped harmonic damper" and see if your's looks like mine did .....
Reply
Old Jul 2, 2020 | 12:24 PM
  #6  
Jjchamblin's Avatar
Thread Starter
Junior Member
 
Joined: Dec 2017
Posts: 12
Likes: 0
Re: 1992 Firebird 3.1 L V6. distributor Timing adjustment


Originally Posted by RBob
IIRC, there are other marks/slots on the stock damper. You may be looking at the wrong one. The other possibility is that the damper is failing and the outer ring has moved. This puts the timing mark in the wrong spot, not at TDC.

Here is a picture of the tab with the timing mark at 11° BTDC:



RBob.
Thank you for the reply, Yes that is the Slit i was referring to. I am on the way to the shop now for further inspection of the car. I have one other question

In the picture attached do you know what connects here
Reply
Old Jul 2, 2020 | 01:38 PM
  #7  
RBob's Avatar
Moderator
iTrader: (1)
 
Joined: Mar 2002
Posts: 18,432
Likes: 233
From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: 1992 Firebird 3.1 L V6. distributor Timing adjustment

Originally Posted by Jjchamblin
In the picture attached do you know what connects here
A.I.R. hose, to inject air into the exhaust. Not sure but it may connect to the other pipe seen at about 4 o'clock from that connection. It appears that the A.I.R. pump is still there, but don't see a belt driving it.

RBob.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Rockfish
TBI
6
Mar 5, 2012 02:17 PM
aammcc
TPI
20
Jan 9, 2010 01:31 AM
Ghigman3
Tech / General Engine
4
Jan 11, 2003 09:33 PM
86Z
Tech / General Engine
2
Jun 13, 2002 05:21 PM




All times are GMT -5. The time now is 08:21 AM.