My 1990 volvo 740 wagon will not start. For a whil, it would only start when cold, not when warm. NOw it won't start at all. I took it to one mechanic, and he said the MAF was out. My current mechanic did a vacuum check on the car, and when the car is starting there is no suction in the car, so he feels the diagnosis of a faulty MAF was incorrect; stating a lack of suctin would make the MAF look bad when it wasn't.
Fuel is not getting to the engine. Fo a while, I was using carborator fluid to start it up, and then it ran, but this isn't working anymore. The car idles badly, and my mechanic thinks it's a valve problem. He wants to do a compression check. Ignition is sparking. Any ideas?
Vacuum problems --car won't start Topic is solved
An engine need three things to run: compression, fuel, and spark.
The first thing to do is a check for a spark, it is also the simplest, if you have spark the do a compression check, finally check for fuel.
You have to follow a logical diagnostic process, just don't guess at what is wrong, the major fault of the problem will be easy to locate, the specific problem or faulty part may be a little more difficult to track down.
The first thing to do is a check for a spark, it is also the simplest, if you have spark the do a compression check, finally check for fuel.
You have to follow a logical diagnostic process, just don't guess at what is wrong, the major fault of the problem will be easy to locate, the specific problem or faulty part may be a little more difficult to track down.
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Stan
The compression is good. The vacuum oscilates when it starts. We think it might be the temperature gauge, or the MAF. Any more thoughts?
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