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Unread 12-18-2008, 09:10 PM   #1
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Default 1988 fifth Avenue stalling problem

I have a 5th Avenue (1988) with a 318. I replace the spark plugs, cap and rotor, fuel filter, and replace the fuel pump. It runs smooth and it does not miss.
This is my problem.....driving down the road it will die. (feel like it is not getting gas.) After it dies, it will start right away and be ok untill the next time. (It seems to it more if you are going faster than 30 kms).
I was thinking now it could be that fuel ignition modular that is on the side of the air breather, or maybe the coil. any ideas?

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Unread 12-18-2008, 10:40 PM   #2
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the fuel modual on the air cleaner is a common failure but what your describing on a car that year sounds more like a crank position sensor or possibly a distibutor pick up. A chrysler that year may refer to a cps as the top dead center sensor which is the same thing or yours may not have one at all hard to tell that year but I would start with the cps if it has one it only cost about 35.00 to by on average. Be far warned if it doesn't want to come out of the block don't brake it they like to swell from old age and exposure to oil and can take some tricks to get out. Both the pick up and CPS will fail usally at higher rpm's and both will reset when the ignition is turned off ,but the p'up won't always restart afterwards another reason that leads me to believe this is your problem. On this car when the p'up fails you will loose ignition and spark so checking fuel pressure could be misleading.

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Unread 12-19-2008, 02:35 AM   #3
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Is this a FI car? I would have thought carburetor? (1988)

Quote:
driving down the road it will die. (feel like it is not getting gas.)
If it's carbed, then I would suspect fuel starvation.

Check the fuel pressure at the carb, weak fuel pump, damaged fuel lines that could restrict fuel flow, carb float valve that could be sticking, plugged fuel tank vent.
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Unread 12-19-2008, 05:08 PM   #4
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Honestly I know nothing of this car and wish I could help. I would agree with lautinjr though about the crank sensor. Ive heard this to be the cause of similar problems.
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Unread 12-19-2008, 07:54 PM   #5
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It has a carb (2 barrel) ,but also on the side of the air breather a "Electronic fuel control system"
I replace the fuel pump, fuel filter, coil, cap and rotor, plugs.
Could be the pick-up coil.
I brought a ignition control modular, square box about 2"x4" with a plug for 4 wires (napa part # Tp51sb) but I was told that some 1988 don't have one (mine don't, i guess I should have look first instead of taking Napa word for it) It seems it is all part of the "Electronic fuel control system" a computor on the side of the air filter housing

Also for the first 3 miles it runs good, then loses power and dies. starts right away and good for 1 miles, then dies...Then it will start and dies 8 times in a mile. but it idles good



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Originally Posted by Mr Car Guy View Post
Is this a FI car? I would have thought carburetor? (1988)



If it's carbed, then I would suspect fuel starvation.

Check the fuel pressure at the carb, weak fuel pump, damaged fuel lines that could restrict fuel flow, carb float valve that could be sticking, plugged fuel tank vent.

Last edited by 89 FIREBIRD; 12-19-2008 at 08:05 PM.

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Unread 12-19-2008, 08:08 PM   #6
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If it's an electronic failure, most times it will shut off cleanly, pumping the gas does nothing.

If it's carb'd and runs out of fuel it will stumble and hesitate just as it dies. Pumping the gas will make it surge momentarily as you empty what's left in the carb.
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Unread 12-20-2008, 01:24 AM   #7
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Quote:
Is this a FI car? I would have thought carburetor? (1988)
It's not a carb just looks like one it's TBI every US car after 1987 came FI unless it was from Canada or something originally or really a 87 which crysler is known for screwing up manufactures dates some times I think if chrysler runs out of something at the factory they will just put what ever they have left from a previous year on the car.LOL

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Unread 12-20-2008, 10:33 AM   #8
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This may help a bit. http://www.fixya.com/cars/t596534-87...s_poor_mileage
Quote:
Re-check the distributor cap - sometimes if it isn't on JUST EXACTLY PERFECT
the engine will have problems starting and running in fact, I'd
double-check everything covered in the tune-up. Or did the car have
problems before the tune-up??
I was searching for problems related to my own fifth avenue ('86) and I remember seeing a post somewhere where they outlined what they did to fix some stalling issues with an '88. I definitely remember that they replaced the electronic fuel control box, and a number of other simple things.
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Unread 12-20-2008, 01:24 PM   #9
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Quote:
After it dies, it will start right away and be ok untill the next time. (It seems to it more if you are going faster than 30 kms).
Quote:
Also for the first 3 miles it runs good, then loses power and dies. starts right away and good for 1 miles, then dies...Then it will start and dies 8 times in a mile. but it idles good
This sure sounds like fuel starvation to me.

Electronic problems are most often "clean" on/off no stumbling. Usually restart is not immediate, only after cooling down.

Running good to start with indicates everything is OK at that time, then the fuel can't get to the engine quick enough and it runs out. When you restart and idle the fuel requirement is greatly reduced until you pick up speed. Then the cycle repeats itself.

After the basics have been checked; loose wires, vacuum hoses, etc, a fuel gauge should be installed on the supply, carb OR FI, and the car driven while monitoring the fuel pressure. You will likely see the fuel pressure dropping before the engine quits.

Yes it could be something else, but this needs to be done to eliminate fuel starvation as the problem. I always got the most likely problem first. It's a very conclusive test to eliminate the fuel supply as the problem. THEN move on to other things if it isn't suspect.
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Unread 12-20-2008, 05:05 PM   #10
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it's is from Canada

Quote:
Originally Posted by lautinjr View Post
It's not a carb just looks like one it's TBI every US car after 1987 came FI unless it was from Canada or something originally or really a 87 which crysler is known for screwing up manufactures dates some times I think if chrysler runs out of something at the factory they will just put what ever they have left from a previous year on the car.LOL

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