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Canadian Poncho Homepage -> Canadian Poncho -> 1970 + Canadian Pontiac Power Train Forum -> Help on a transmission problem?
Post Info TOPIC: Help on a transmission problem?
455gto


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 Changed the coil and still have a puking problem when I floor it and changing from 1st to drive. I can rev the engine up to 5000 with no puking. Keep it in first high rev's no problem. Drive the car like normal...no problems.

If it was fuel pump it would do it when I rev it. Only in motion so I'm thinking transmission or would it be my torque converter?

Who knows a good transmission guy on the west coast?

It a turbo 400 Pontiac



-- Edited by 455gto on Sunday 22nd of May 2011 12:11:09 PM

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Canadian Poncho


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What do you mean by a "puking" problem? Is it bogging out, stalling?


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455gto


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Like it's not getting enough fuel. But in park bringing it up to 4000RPM-5000RPM IS NOT A PROBLEM.

Just when I'm driving it and stomp on it.........it starts to go then blah blah blah



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427carl


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That might be your carb   not trans 



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degodoug


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Agree......

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SD 396


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Carb or timing



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Canadian Poncho


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Sounds like it's leaning out under load. Carb, camshaft, low fuel pressure are some of the possible reasons.

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Led Zeppelin


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what kind of carb?

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455gto


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Led Zeppelin wrote:

what kind of carb?

 Rochester 1968. It's been rebuilt. Motor is fresh. 

So it could be the pick-up in the tank. Not getting enough to the pump. Might try an electric pump in the tank.

Car purrs like a kitten and easy start. If I change the timing...confuseconfuseconfuse

Could it be the secondary jets on the carb being too small confuse



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65sssd


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For a joke throw a 750 holley on it. I bet it will Fly. Sounds like your motor is thirsty.

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gparis7


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First thing I'd do is check the fuel pressure at the carb. If it's below spec that's likely your problem. 



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67SD396


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I think Paul (65sssd) is 100% correct.....Sounds like carb to me too. I tried to run a quadrajet on a 427 after a cam swap and I couldn't get past 2nd gear without running out of gas. Installed a holley with bigger float bowls and the problem was gone. Even with an electric fuel pump, the quadrajet was just not enough fuel for a thirsty BB.

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455gto


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You guys got me thinking.......The carb is for a 400 car. Not a 455. Being that I'm pushing more power on a fresh engine build. That carb might not be big enough confuse

 

I'll have to see what I can use on my collector plates to be period correct 



-- Edited by 455gto on Monday 23rd of May 2011 11:14:18 AM

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4SPEED427


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You guys will think I always suggest the same thing cause I suggested this a few days back with someone else's driveability problem!

But anywhere, here goes---

Float level bad and the bowl is not full enough?

Years ago, I drag raced a 327 Acadian that would take off like a scared rabbit and then fall on it's face. A simple float level adjustment solved that problem.

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the70judge


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Carl Stevenson wrote:

You guys will think I always suggest the same thing cause I suggested this a few days back with someone else's driveability problem!

But anywhere, here goes---

Float level bad and the bowl is not full enough?

Years ago, I drag raced a 327 Acadian that would take off like a scared rabbit and then fall on it's face. A simple float level adjustment solved that problem.

 Now that sounds like it just might be the problem ... I am the builder of the carb and I tell you I went over her like a fine tooth comb but... Hey I have only built a couple carbs Kim...  Sooooo Its highly possible.  

  I drove her and in first gear you can push her right up to 4000 rpm with no power loss, tried it in second and its the same... but if your rolling and punch it the passing gear kicks in and it just bogs down... thats why I was thinking it could be the tranny slipping somehow... its also down around a pint of tranny fluid...



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Pete
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If the trans were slipping your engine would rev, not bog.

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455gto


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Hey Pete 

Send me the name of that guy in Edmonton that does carbs. Hopefully he's got a 455 carb. Or has anyone dealt with Evilbay on carbs?

Thanks for the info guys....saves me a whole lota money at the tranny shop



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the70judge


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455gto wrote:

Hey Pete 

Send me the name of that guy in Edmonton that does carbs. Hopefully he's got a 455 carb. Or has anyone dealt with Evilbay on carbs?

Thanks for the info guys....saves me a whole lota money at the tranny shop

 I think this is the guy..  http://www.carbshop.ca/html/aboutus.html



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the70judge wrote:
455gto wrote:

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=280680370807&viewitem=&clk_rvr_id=234777164306

 



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the70judge wrote:

Here is one for you Kim......  Make him an offer as it says ;>)

http://peterborough.canadianlisted.com/car-parts/rare-1970-pontiac-gto-455-carburetor_1072249.html

And its in Ontario.... and you will have the proper carb for that engine... The one you have there just needs an adjustment or a "real... carb person" to go over it and it would be good also but it will sell for good money as is...

 



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Pete
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Kim, Did you get your carb fixed/tuned or replaced ?



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lueger68


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Kim I call the rochester a boggerjet I had the same problem with mine years ago before I tossed her . I am Holley lover and run a old school 700 double pumper on my Stroker.
If you like I could take her off and we can bolt it on your car and see how she runs, I have re-built it myself a couple of times over the years and got it tuned so nice that as hard as you can hit the pedal it respond's instantly , never has it bogged once. Something to think about.
I think you would have to run a spacer as you will have a spread bore intake for the q-jet. Let me know buddy
Kevin

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455gto


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I got a Ram Air 3 carb coming from Maryland. He's off the PY forums. I should have it next week.

Kevin I have a spacer and and a old holly maybe. Never could get that Holley to run.

Let me know if you have time maybe we can change it and take it for a burn



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lueger68


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455gto wrote:

I got a Ram Air 3 carb coming from Maryland. He's off the PY forums. I should have it next week.

Kevin I have a spacer and and a old holly maybe. Never could get that Holley to run.

Let me know if you have time maybe we can change it and take it for a burn

 Ya up to you Kim why dont you try your new one first and if it's still not good then i will bring my holley over. What brand of carb are you getting and what was it worth?



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the70judge


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lueger68 wrote:

Kim I call the rochester a boggerjet I had the same problem with mine years ago before I tossed her . I am Holley lover and run a old school 700 double pumper on my Stroker.
If you like I could take her off and we can bolt it on your car and see how she runs, I have re-built it myself a couple of times over the years and got it tuned so nice that as hard as you can hit the pedal it respond's instantly , never has it bogged once. Something to think about.
I think you would have to run a spacer as you will have a spread bore intake for the q-jet. Let me know buddy
Kevin

 Good one but I have been using my Numbers matching quadrajet since the resto on my Judge and No bogs..  Each to their own I guess.. I  am not a lover of the holley on a GM Product .. Didnt most of them come stock on a F--d????  :>)

 



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