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Forum: 70-73 Firebird & TA TECH 09-14-2014, 07:30 PM
Replies: 17
Views: 442
Posted By prexford
I can get the needle to register on both...

I can get the needle to register on both tachs..little movement to zero from start up, but nothing more. I got 2 tachs, both are doing the same thing.
Forum: 70-73 Firebird & TA TECH 09-14-2014, 06:46 PM
Replies: 17
Views: 442
Posted By prexford
Good test. But I've done that. I read on forums...

Good test. But I've done that. I read on forums the pertronix has a differ signal and a tach adapter or filter is or may be required?
Forum: 70-73 Firebird & TA TECH 09-14-2014, 03:40 PM
Replies: 17
Views: 442
Posted By prexford
I did nothing else under the hood or dash when...

I did nothing else under the hood or dash when the tach stopped working. My old original tach worked with pertronix, for 10 years. Then one night it started bouncing around. I instLled an OER tach...
Forum: 70-73 Firebird & TA TECH 09-14-2014, 07:28 AM
Replies: 17
Views: 442
Posted By prexford
2 connections:, one to coil neg other to 12v, and...

2 connections:, one to coil neg other to 12v, and tach is grounded.
Forum: 70-73 Firebird & TA TECH 09-13-2014, 09:37 PM
Replies: 17
Views: 442
Posted By prexford
Tach not working

My original 71 tach stopped working. Bought OER and it will not work. Sent old tach to get rebuilt with new electronic board versus mechanical and it will not work. Us inning Pertronix ignitor 2. ...
Forum: 70-73 Firebird & TA TECH 07-20-2014, 10:59 AM
Replies: 3
Views: 243
Posted By prexford
1971 Firebird Tachometer rebuild service

Anyone know where I can send my tach to get fixed? Stopped working and OER tach is garbage. It stopped working after 30 days and 2 diodes got burnt out. Want to fix my original.
Forum: 70-73 Firebird & TA TECH 12-15-2013, 10:49 AM
Replies: 4
Views: 466
Posted By prexford
Found this thread here. Great detail on 71-72 ...

Found this thread here. Great detail on 71-72 production numbers. I think you might have to use the percentage numbers givin to determine greater detail. Will post what I find for my car, curious...
Forum: 70-73 Firebird & TA TECH 12-14-2013, 05:50 PM
Replies: 4
Views: 466
Posted By prexford
Production numbers for 1971 formula 400 4 speed

Anyone have the production number breakdowns for the formula 350, 400, 455, 455HO?
Forum: Pontiac - Street 10-27-2013, 10:02 AM
Replies: 18
Views: 726
Posted By prexford
Thanks. It was snug, had to use a 1/4" socket to...

Thanks. It was snug, had to use a 1/4" socket to go over it to tap in place.
Forum: Pontiac - Street 10-27-2013, 08:15 AM
Replies: 18
Views: 726
Posted By prexford
I have an original numbers matching distributor....

I have an original numbers matching distributor. The weights were not sticking, just one of the pressed in pins that the weight slides over came out (thus leaving the weight in the full open...
Forum: Pontiac - Street 10-26-2013, 12:23 PM
Replies: 18
Views: 726
Posted By prexford
I thought it was fuel to, but tried the easier...

I thought it was fuel to, but tried the easier checks for a fix like 72 lux suggested. Found the weight was hanging on and disconnected. Fixed that and problem went away. Cliff restored my carb 2...
Forum: Pontiac - Street 10-26-2013, 10:40 AM
Replies: 18
Views: 726
Posted By prexford
Found the problem...the distributor weight. the...

Found the problem...the distributor weight. the pressed in pin that one of the weights slides over came out. I pressed it back in and worked perfect, all the way to redline again. It did however...
Forum: Pontiac - Street 10-21-2013, 06:07 AM
Replies: 18
Views: 726
Posted By prexford
I'm running pertronix in my distributor, but will...

I'm running pertronix in my distributor, but will check it out thanks! I was able to set my timing to sevEral initial settings and it held, why do you think I'm bogging down at 3500rpm?
Forum: Pontiac - Street 10-20-2013, 03:33 PM
Replies: 18
Views: 726
Posted By prexford
I'm experiencing the same problem as Retlt0123,...

I'm experiencing the same problem as Retlt0123, however, I have a manual 4 speed 1971 Formula 400 and it does it in 1st, and 2nd, did not try 3rd and 4th, but assume it's the same. I had my timing...
Forum: Pontiac - Street 08-31-2009, 07:07 PM
Replies: 22
Views: 733
Posted By prexford
IT WAS THE FLOAT!!! You guys are awesome...how do...

IT WAS THE FLOAT!!! You guys are awesome...how do you know all these things?? I could not wait to get off work today to install the rebuild kit (BTW...only put in the float from the kit). I was...
Forum: Pontiac - Street 08-30-2009, 08:40 PM
Replies: 22
Views: 733
Posted By prexford
i have not checked the rockers. They are not...

i have not checked the rockers. They are not making any noises.
Forum: Pontiac - Street 08-30-2009, 08:14 PM
Replies: 22
Views: 733
Posted By prexford
OK, I'll check the float. i have a factory intake...

OK, I'll check the float. i have a factory intake and carb and timing is unchanged from 12BTD. What do the results from the leakdown and compresstion test mean?
Forum: Pontiac - Street 08-30-2009, 07:25 PM
Replies: 22
Views: 733
Posted By prexford
The plugs looked like a medium/dark oil color. i...

The plugs looked like a medium/dark oil color. i think i smellled some fuel. i'm not blowing any smoke out of the tail pipes, but the fumes are bad. How can I tell if the float is bad? I have the...
Forum: Pontiac - Street 08-30-2009, 05:59 PM
Replies: 22
Views: 733
Posted By prexford
i warmed the engine up and did a compression...

i warmed the engine up and did a compression check and found the same readings, even on #4 and #6 that were the two lowest. I then did a leak down test and found that #4 and #6 have a 70% and 60%...
Forum: Pontiac - Street 08-30-2009, 03:21 PM
Replies: 22
Views: 733
Posted By prexford
I changed out my spark plug wires and still have...

I changed out my spark plug wires and still have same problem. I ran the car for about 2 minutes and did a compression check; #3 @ 149psi, #1, 2, 5 @148psi, #7@145psi, #8@140psi, #6@131psi and...
Forum: Pontiac - Street 08-30-2009, 10:51 AM
Replies: 22
Views: 733
Posted By prexford
My 400 sounds like a VW Bettle and has wet plugs

I went to a local cruise night and my Formula 400 drove great to the show. When I drove home it sounded like a Volkswagen and no torque power. I first thought someone had stuffed a rag in my exhaust...
Forum: 70-73 Firebird & TA TECH 07-23-2009, 04:55 PM
Replies: 1
Views: 130
Posted By prexford
bolt size for the front stabilizer bar 1971 firebird

Does anyone know the proper bolt size for the front stabilizer bar? I'm talking about the 2 bolts that go through the "U" shaped bracket and mount to the frame. It looks mine has 7/16" size threaded...
Forum: 70-73 Firebird & TA TECH 07-08-2009, 08:24 PM
Replies: 27
Views: 853
Posted By prexford
My vacuum harness to to a/c control module is...

My vacuum harness to to a/c control module is exaclty like yours and all the other connections were in place just as your picture. I put the black line in the open hole as shown in your picture and...
Forum: 70-73 Firebird & TA TECH 07-07-2009, 08:45 AM
Replies: 27
Views: 853
Posted By prexford
I'll post later next week to see if any...

I'll post later next week to see if any temperature changes occur from this. Thanks again Bill. I'm sure this will help many more readers that come.
Forum: 70-73 Firebird & TA TECH 07-06-2009, 07:39 PM
Replies: 27
Views: 853
Posted By prexford
Thats would be awesome, thanks Bill!! Someone...

Thats would be awesome, thanks Bill!! Someone before me stuck the heater core door in the open position so it would work in the A/C mode all the time. Gave me the illusion everything worked properly...
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