mmerlinn
Well-Known Member
- Joined
- July 2, 2012
- Messages
- 109
- Reaction score
- 2
- City, State
- Here, There, and Everywhere
- Year, Model & Trim Level
- Aero 93@430000: 90@155000
My 93 Aero has been giving me fits for months and no one can tell me what is wrong with it. I have had it to four different shops and nobody has given me any clue as to what the problem is.
Basically, it drives like it is not getting enough fuel. Surges. No power to climb even the slightest of hills. Sometimes will take half a mile to go from 0mph to 25mph on the level and even longer on a SLIGHT upgrade (like a 30 foot rise in half a mile). When I step on the gas, it takes even longer, unless I floor it.
Here is what I have done:
1) Replaced fuel pressure regulator - starts better, but no change otherwise
2) Replaced fuel pump - much quieter, but no improvement
3) Found and fixed pinched fuel line - no improvement, other than it no longer stalls
4) Replaced air flow sensor assembly by the air cleaner - no improvement
5) Replaced ignition control module three times - no change
6) Replaced cats - no change - rear cat looked new, front cat was partially plugged - no loose contents to plug muffler
7) Replaced cap, rotor, and wires twice - no change
8) Checked distributor shaft for slop - none
9) Checked wiring connections - no problems found and no change
10) Checked for codes - none
11) Check engine light only comes on when I start - never on when driving
Engine runs fine with no missing at idle or when revved up. Drives like it is missing on ALL 6 cylinders whenever more power is needed.
Uses less than a quart of oil every 3000 miles, and has been that way for over 10 years.
Not losing coolent.
Not running hot or cold.
Cannot find any vacuum leaks.
No leaking fuel.
No unusual noises.
Sometimes I can drive it on the level for 50 or 100 miles with plenty of power and no problems. Other times I am lucky to get it to move at all.
The stalling problem I had in the past as noted in another thread, is no longer a problem, as the motor no longer stalls at all. I believe the stalling was an unrelated problem.
I would like to find and solve this problem. The engine has 382,000 miles on it and still does not use oil, so I believe that it still has a lot of miles left in it. Since there are no coolant problems, no burning oil problems, etc, I assume that the problem is somehow or other related to some sort of a control problem (electrical, fuel, etc) and not a mechanical problem.
I have not changed various sensors, although a bad sensor will cause weird problems. I would rather fix what is bad than use the scatter gun approach and hope, hundreds of dollars later, that I might accidentally fix the problem. So, the question is, how do I test sensors?
And how do I find the problem? Once found, fixing it will be easy.
Any help would be greatly appreciated. I need to get this fixed.
Basically, it drives like it is not getting enough fuel. Surges. No power to climb even the slightest of hills. Sometimes will take half a mile to go from 0mph to 25mph on the level and even longer on a SLIGHT upgrade (like a 30 foot rise in half a mile). When I step on the gas, it takes even longer, unless I floor it.
Here is what I have done:
1) Replaced fuel pressure regulator - starts better, but no change otherwise
2) Replaced fuel pump - much quieter, but no improvement
3) Found and fixed pinched fuel line - no improvement, other than it no longer stalls
4) Replaced air flow sensor assembly by the air cleaner - no improvement
5) Replaced ignition control module three times - no change
6) Replaced cats - no change - rear cat looked new, front cat was partially plugged - no loose contents to plug muffler
7) Replaced cap, rotor, and wires twice - no change
8) Checked distributor shaft for slop - none
9) Checked wiring connections - no problems found and no change
10) Checked for codes - none
11) Check engine light only comes on when I start - never on when driving
Engine runs fine with no missing at idle or when revved up. Drives like it is missing on ALL 6 cylinders whenever more power is needed.
Uses less than a quart of oil every 3000 miles, and has been that way for over 10 years.
Not losing coolent.
Not running hot or cold.
Cannot find any vacuum leaks.
No leaking fuel.
No unusual noises.
Sometimes I can drive it on the level for 50 or 100 miles with plenty of power and no problems. Other times I am lucky to get it to move at all.
The stalling problem I had in the past as noted in another thread, is no longer a problem, as the motor no longer stalls at all. I believe the stalling was an unrelated problem.
I would like to find and solve this problem. The engine has 382,000 miles on it and still does not use oil, so I believe that it still has a lot of miles left in it. Since there are no coolant problems, no burning oil problems, etc, I assume that the problem is somehow or other related to some sort of a control problem (electrical, fuel, etc) and not a mechanical problem.
I have not changed various sensors, although a bad sensor will cause weird problems. I would rather fix what is bad than use the scatter gun approach and hope, hundreds of dollars later, that I might accidentally fix the problem. So, the question is, how do I test sensors?
And how do I find the problem? Once found, fixing it will be easy.
Any help would be greatly appreciated. I need to get this fixed.