940 1993 huge running issue
#1
940 1993 huge running issue
Hi,
I need help diagnosing this problem that my volvo has had for a long time now and i just can't figure out what the actual problem is The car is undriveble. So the car starts but dies after second or two. No idle at all. If i want to keep the car running i have to play with the throttle ALOT and it runs terribly. Also my brother noticed that there were loud pops coming from the airfilter box as i was trying to keep the car running.
I have done some service to the car:
-Air intake manifold gasket change
-Throttle body gasket change
-Fuel filter
-Cap, rotor and wires
-Spark plugs
-Egr valve cleaning
-Pulsair valves change
-Pcv valve and oil breather box change
And the car behaves exactly the same as before. So could it be a faulty distributor or faulty injectors? Or something else? Help me out! Thanks in advance!
Car is 1993 940 sedan with B230FD engine
I need help diagnosing this problem that my volvo has had for a long time now and i just can't figure out what the actual problem is The car is undriveble. So the car starts but dies after second or two. No idle at all. If i want to keep the car running i have to play with the throttle ALOT and it runs terribly. Also my brother noticed that there were loud pops coming from the airfilter box as i was trying to keep the car running.
I have done some service to the car:
-Air intake manifold gasket change
-Throttle body gasket change
-Fuel filter
-Cap, rotor and wires
-Spark plugs
-Egr valve cleaning
-Pulsair valves change
-Pcv valve and oil breather box change
And the car behaves exactly the same as before. So could it be a faulty distributor or faulty injectors? Or something else? Help me out! Thanks in advance!
Car is 1993 940 sedan with B230FD engine
#4
Thanks for the help. I unplugged the MAF and the car was running better. It wasn't running perfectly but engine did not stall once and the car was actually drivable. YAY! I cleaned the MAF with air sensor cleaner but nothing changed. I plug the MAF wire back on and the engine stalls almost immediately. So is it a faulty MAF? Timing belt was fine.
#5
Thanks for the help. I unplugged the MAF and the car was running better. It wasn't running perfectly but engine did not stall once and the car was actually drivable. YAY! I cleaned the MAF with air sensor cleaner but nothing changed. I plug the MAF wire back on and the engine stalls almost immediately. So is it a faulty MAF? Timing belt was fine.
As for the MAF, it wouldn't hurt to replace it.
#6
Gotta agree with pierce on this. Although the MAF and the timing belt might be fine it requires a closer inspection.
The point. Pulling the MAF is simply to force it to run in a pre programmed mode. This will cause terrible gas mileage, but establishes a baseline of "How bad is it"
What happened to me was the roller pins that hold the timing gears to the cams were sheared. I replaced them with solid stainless steel pins from IPD. The only way to know that is is to pull the belt and cams. This is also a very common problem with these engines.
The belt also may have slipped a tooth, both things will cause terrible problems such as you described.
The point. Pulling the MAF is simply to force it to run in a pre programmed mode. This will cause terrible gas mileage, but establishes a baseline of "How bad is it"
What happened to me was the roller pins that hold the timing gears to the cams were sheared. I replaced them with solid stainless steel pins from IPD. The only way to know that is is to pull the belt and cams. This is also a very common problem with these engines.
The belt also may have slipped a tooth, both things will cause terrible problems such as you described.
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