1992 940 starts with plug wire out near ground
 

Hi everyone, I am new to Volvo and this great forum!

My 1992 940 Volvo stalls at stops and sometimes while driving. The rpm drops and the engine cuts off. It takes a few or many trys to crank the engine over and then it will start. But what I do notice is if I pull the spark plug wire out and put it 3/4 in. to the block, the engine cranks everytime in the first try.

Could this be the Hall sensor or something else like the ground loose somewhere?


Thanks for the replies!

RE: 1992 940 starts with plug wire out near ground
 

See if you have a speed sensor on the back of the engine. If not then it would be either the module in the Dist or the power stage,

RE: 1992 940 starts with plug wire out near ground
 

I check the speed sensor (rpm or crank) and it had a tear on the outer black sheathing and was making contact to the engine block's hoisting mount (eye).

I also checked the ignition power stage module and plug which looked good.


I went to the local volvo dealer and bought both sensor and module. I will update the fourm with the results in a couple of days.


Thanks Tech!

RE: 1992 940 starts with plug wire out near ground
 

I replaced both speed sensor and ignition power stage module and drove it for 30 mins with no problem. After I had parked and started it a few times it was fine. After the 10th time doing this, it started then died. I tried to duplicated the start and died routine and I was able to tap the fuel pump relay when it was dying and it started to run again. I guess I will replace the fuel pump relay tomorrow and test drive it again.

RE: 1992 940 starts with plug wire out near ground
 

The relay should also be dated. They usually only last 5 years.

RE: 1992 940 starts with plug wire out near ground
 

Update!

After replacing the fuel pump relay, I had no starting problems. Also I have no engine cut-off while driving after replacing the speed sensor in the last 3 weeks.

Thanks Tech and everyone on the forum!

RE: 1992 940 starts with plug wire out near ground
 

Glad we could help.