Turbo400 question?
Thread Starter
Pro
Joined: Oct 2010
Posts: 606
Likes: 48
From: Mystic Ct.
Turbo400 question?
Just took the car out after rebuilding the engine and transmission. When I get above 35 mph, the engine/transmission does not slow down when I lift off the gas. I have to really get on the brakes to get it slowed down and then when the speed gets to about 20-30 mph it has a sudden downshift.
Does anyone know if it's engine or transmission related?
Thanks for any help, kinda scary to drive like that.
Russ
Does anyone know if it's engine or transmission related?
Thanks for any help, kinda scary to drive like that.
Russ
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,754
From: Charlotte NC
YEAH...that would get anybodies attention...that is for sure.
I feel it is throttle related....because it has happened to me while testing before.
Not knowing anything about your car. And what you may have replaced to make it look good BUT...you can be having the throttle hang up on the air cleaner base. ...or no throttle return springs installed.
I have to start and stop here because it is like trying to answer the puzzle when playing 'Jeopardy' with only one square turned over.
Remove the air cleaner for a quick run and see what happens....or feel the underside of the air cleaner when someone pressed on the accelerator pedal.
DUB
I feel it is throttle related....because it has happened to me while testing before.
Not knowing anything about your car. And what you may have replaced to make it look good BUT...you can be having the throttle hang up on the air cleaner base. ...or no throttle return springs installed.
I have to start and stop here because it is like trying to answer the puzzle when playing 'Jeopardy' with only one square turned over.
Remove the air cleaner for a quick run and see what happens....or feel the underside of the air cleaner when someone pressed on the accelerator pedal.
DUB
Thread Starter
Pro
Joined: Oct 2010
Posts: 606
Likes: 48
From: Mystic Ct.
YEAH...that would get anybodies attention...that is for sure.
I feel it is throttle related....because it has happened to me while testing before.
Not knowing anything about your car. And what you may have replaced to make it look good BUT...you can be having the throttle hang up on the air cleaner base. ...or no throttle return springs installed.
I have to start and stop here because it is like trying to answer the puzzle when playing 'Jeopardy' with only one square turned over.
Remove the air cleaner for a quick run and see what happens....or feel the underside of the air cleaner when someone pressed on the accelerator pedal.
DUB
I feel it is throttle related....because it has happened to me while testing before.
Not knowing anything about your car. And what you may have replaced to make it look good BUT...you can be having the throttle hang up on the air cleaner base. ...or no throttle return springs installed.
I have to start and stop here because it is like trying to answer the puzzle when playing 'Jeopardy' with only one square turned over.
Remove the air cleaner for a quick run and see what happens....or feel the underside of the air cleaner when someone pressed on the accelerator pedal.
DUB
Will check everything tomorrow.
Thanks again.
Russ
Le Mans Master
Joined: Sep 2003
Posts: 8,812
Likes: 2,029
From: eastern NC
Just took the car out after rebuilding the engine and transmission. When I get above 35 mph, the engine/transmission does not slow down when I lift off the gas. I have to really get on the brakes to get it slowed down and then when the speed gets to about 20-30 mph it has a sudden downshift.
Russ
Russ
Good luck... GUSTO
Le Mans Master
Joined: Aug 2006
Posts: 7,426
Likes: 1,559
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
http://www.summitracing.com/parts/FEL-1905/
Last edited by Peterbuilt; Aug 10, 2015 at 02:20 PM.
Thread Starter
Pro
Joined: Oct 2010
Posts: 606
Likes: 48
From: Mystic Ct.
I recently had the tranny rebuilt, but haven't had a chance to talk with the transmission shop.
Thanks
Russ
Le Mans Master
Joined: Sep 2003
Posts: 8,812
Likes: 2,029
From: eastern NC
While driving, when I let off the gas, the car will not slow down. I didn't see any drop in the RPM's. If I shift it into neutral, the RPM's drop like they should.
I recently had the tranny rebuilt, but haven't had a chance to talk with the transmission shop.
Thanks
Russ
I recently had the tranny rebuilt, but haven't had a chance to talk with the transmission shop.
Thanks
Russ
Good luck... GUSTO
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Le Mans Master
Joined: May 2007
Posts: 5,025
Likes: 1,120
From: North tonawanda NY
I had a van that behaved this way when the torque converter started failing.... It would even stall at a red light as the van wanted to pull through the brakes...
(Off topic)
It ended up being a big ordeal since it was a company van. My boss told the shop it seemed like the converter when we dropped it off. Goodyear replaced the whole transmission and REINSTALLED the bad converter so back it went 20 minutes after picking it up, to have the converter changed and Goodyear would not budge on the $3200 they charged for the transmission it did not need... Got to love techs who get paid on commission later they quoted us over 3 grand for brakes... Took it to the ford dealership and they did the work for under a grand.. Never took another vehicle to Goodyear again.
(Off topic)
It ended up being a big ordeal since it was a company van. My boss told the shop it seemed like the converter when we dropped it off. Goodyear replaced the whole transmission and REINSTALLED the bad converter so back it went 20 minutes after picking it up, to have the converter changed and Goodyear would not budge on the $3200 they charged for the transmission it did not need... Got to love techs who get paid on commission later they quoted us over 3 grand for brakes... Took it to the ford dealership and they did the work for under a grand.. Never took another vehicle to Goodyear again.
Last edited by augiedoggy; Aug 11, 2015 at 09:05 AM.
Thread Starter
Pro
Joined: Oct 2010
Posts: 606
Likes: 48
From: Mystic Ct.
Update
Figured out what the problem was.
Had a carb from a 73 on the engine. Trying to figure out the vacuum hoses, realized I had the wrong carb on it. When I got ready to change the carb, found I had only finger tightened the bolts, so it was sucking a lot of air from between the carb and manifold.
Put on the original carb, torqued the nuts and bolts and the car now slows down when I let off the gas.
Now I really feel stupid!!!!! At least I figured it out.
Thanks everyone for the help.
Russ
Had a carb from a 73 on the engine. Trying to figure out the vacuum hoses, realized I had the wrong carb on it. When I got ready to change the carb, found I had only finger tightened the bolts, so it was sucking a lot of air from between the carb and manifold.
Put on the original carb, torqued the nuts and bolts and the car now slows down when I let off the gas.
Now I really feel stupid!!!!! At least I figured it out.
Thanks everyone for the help.
Russ