Mechanics

TURBO 4-CYLINDER PROBLEM

1991 Volvo 940

I have a 1991 volvo 940 turbo 4-cylinder with 207k miles, and it is really hard to start. You have to pump the gas < --(May or may not be doing anything) and continue trying to start engine until it finally starts; then you have to immediately rev the engine and keep the RPMs up or it will die and you are back where you started. I have two questions: Can a bad turbo account for this, and could you tell me the other things that may account for this?
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Adrilyn272
September 5, 2006.




Well there could b a fwe things makeing that problum #1 would b your starter is going bad after 200k miles it may need to b replaced lol #2 a vack leak could b the problum, because the cooler the eng is the more air some parts need to get going for presher perps and when it from crankin for so long warms it up enuf to start. #3 when was the last tuneup? Thats very important, bad sparkpulgs and sparkpulg wire and distributor will mean no spark and there for the eng is haveing a problum kickin its self over. #4 the battery may b bad. Just because it makes it crank dosent mean its giveing the car all the power it needs. Hope I was some help.

Tiny
Darkmushroom901
Sep 7, 2006.
I have been working on the car a good bit lately, and I have fixed several problems. The first problem was the battery was dead; then, someone had rewired the fusebox and had several things crosswired. I fixed the wiring, and replaced the battery. There are two notable symptoms still. To start the car, I have to try cranking it in short bursts until it gradually turns over enough to keep running. Then, once the car is running, if I gently push the gas, it will rev up to 2000 rpms then start sputtering. If I push the gas very hard at idle, it will rev slightly past 2000 RPMs then I can carefully work it up to 3 - 4000 RPMs without any trouble. If I am not careful, it is very easy to kill the engine doing this. One thing I know of is that one of the turbo hoses has a sensor in it, and the sensor is loose, possibly allowing a leak of pressure. I don't know if this is a possible cause of my problem. All suggestions of possible solutions or things to try will be gladly accepted.

Jeff

Tiny
Adrilyn272
Sep 11, 2006.
Well like I said im not sure about turbos at all realy, but I would guess, get some one to put there hand or a slip of paper near the loose part and see if it is sucking it to it. If it dose than you have a leak and it needs to b tighter, if u can't get it tighter u my have to see about replaceing that part, (junkyard's are very cheep) next did u check all your hoses for any type of a leak. Anotherthing I thought of. Dose the turbo sound like its kicking in at all? If not then u should pull it out and have it looked at. If you don't know what your doing as far as takeing it out go to a shop and have them or someone that knows take it out. Hope I was some help

Tiny
Darkmushroom901
Sep 11, 2006.
I have asked several mechanics about the turbo, and they have told me that on a 1991 volvo, the turbo should not kick in while in idle or parked. I believe you may be correct that the starter is why I am having trouble starting the vehicle, and I will be replacing that soon to find out for certain. I am wondering if the engine timing being incorrect could result in the power loss problem I am having. Whenever I shift into gear (putting a load on the engine) the engine falters and dies. The check engine light doesn't come on, so that leads me to believe that all the sensors are fine. There is new information about the car that I recently acquired: The entire fuel system is brand-new. New fuel pumps, filter, fuel lines, and the tank has been cleaned. Apparently someone had put bad gas(?) Into the car, and it damaged the fuel system. I think that the starter going out may have been the problem all along, and the people working on the car generated new problems not realizing that the starter was why the car wouldn't start. If anyone else is reading this post, please throw in your two-cents worth, all opinions help me narrow down the problem.
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Tiny
Adrilyn272
Sep 13, 2006.

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