84 problem
Thread Starter
5th Gear
Joined: Jun 2007
Posts: 5
Likes: 0
84 problem
I have a friend with a 84 model. I did all the usual tuning plus intake gaskets, but it bucks real hard once or twice every once in a while, usually on light acceleration around 55 mph. Otherwise it runs and idles fine. Check engine light usually comes on at cold start and goes out after a few minutes. Gives a code 34.(after clearing codes a day before)
One other thing, the fan is always on with the ignition on, but temp. goes as high as 230 at speed.
Any suggestions appreciated. (I'm a bodyman, so take the tech easy on me)
Thanks, Mark
One other thing, the fan is always on with the ignition on, but temp. goes as high as 230 at speed.
Any suggestions appreciated. (I'm a bodyman, so take the tech easy on me)
Thanks, Mark
Racer
Joined: Jun 2005
Posts: 275
Likes: 0
From: Pembroke NH
I have a friend with a 84 model. I did all the usual tuning plus intake gaskets, but it bucks real hard once or twice every once in a while, usually on light acceleration around 55 mph. Otherwise it runs and idles fine. Check engine light usually comes on at cold start and goes out after a few minutes. Gives a code 34.(after clearing codes a day before)
One other thing, the fan is always on with the ignition on, but temp. goes as high as 230 at speed.
Any suggestions appreciated. (I'm a bodyman, so take the tech easy on me)
Thanks, Mark
One other thing, the fan is always on with the ignition on, but temp. goes as high as 230 at speed.
Any suggestions appreciated. (I'm a bodyman, so take the tech easy on me)
Thanks, Mark
Thread Starter
5th Gear
Joined: Jun 2007
Posts: 5
Likes: 0
Sorry, the intake setup was done at a shop. (all topside gaskets) I doubt that the other stuff to the sensors and bodies was done. The intake gaskets were shot and leaking everywhere, idle was 1200. Now, even, idle is 600 to 700, smooth acceleration, everything is fine except the occasional buck,1 or 2 times in a 25 mile trip.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
That idle rules out a vacuum leak and the need to synchronize the TBs, and and make the minimum air adjustment. Since it only takes a few seconds, there is no reason not to check the TPS adjustment while the DVM is out. The first thing is to trouble shoot you MAP code. It may need a new MAP and maybe not. Don't throw money and parts at it. Trouble shoot it. If he is keeping the car and one of you will be working on it, repairs will be quicker and cheaper if he orders the factory service manual (FSM).
With information from the manual he/you should be able to fix the hacked wiring for fan, which shouldn't come on until approx 235°, and **** off at approx 225°. And also perform the "deferred maintenance" on the cooling system. "At speed" the engine should be in the 200° - 215° range.
RACE ON!!!
With information from the manual he/you should be able to fix the hacked wiring for fan, which shouldn't come on until approx 235°, and **** off at approx 225°. And also perform the "deferred maintenance" on the cooling system. "At speed" the engine should be in the 200° - 215° range.
RACE ON!!!
Thread Starter
5th Gear
Joined: Jun 2007
Posts: 5
Likes: 0
The car belongs to an older man who bought it for his grandson and has spent about all he can on it. I'll tell him about the manual.
hopefully it can make 500 miles to grandsons house.
Thanks for info.
By the way, what's deferred maintenance on the cooling system?
Mark
hopefully it can make 500 miles to grandsons house.
Thanks for info.
By the way, what's deferred maintenance on the cooling system?
Mark
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by warped1
By the way, what's deferred maintenance on the cooling system?
Mark
Mark
RACE ON!!!
