Volvo Troubleshooting Questions? Ask a Mechanic for Answers ASAP
Hi, I’m Ron and I can help you.I have been in the auto repair business with my own shops since 1975 and also teach automotive repair. I am confident we can resolve your problem together. Please understand that I don't know your skill level. In most cases when you have a problem with the way the vehicle performs, specialized tooling is required to acquire computer data/information or engine testing results. We didn’t build these complicated vehicles; we just diagnose and fix them. Also understand that I can't see, smell, hear, or touch the vehicle either, so it may take a few replies to get to satisfactory results. I am also going to direct you with the fastest, easiest and most common things to check first. Please be patient and permit me to do what I do best.I also try to give all of the information you may need, expecting a “positive rating” in return. I will also continue assisting you after you have rated me, if necessary. If there is any reason I cannot get a positive rating, please let me know why “in advance”, so I can go another direction for you. I am sorry you’re having this problem; I’ll help you through it.
We're losing either spark or fuel. At the time it does not start, you need to be ready with a spark tester attached to a plug wire, and also a fuel pressure gauge attached to the fuel rail. In most cases, the CRANK sensor overheats causing a loss of spark.
Could be a bad crank sensor or the armature on the fuel pump can also be bad, that's why i recommended the tests I did.
Thanks again, and please don't forget to rate me and keep this link in case you need me again later on.
Either, we need to start with the easiest and most common things first. You can attach a scan tool and get immediate information too.
That may be true, but i think enough guessing has been done. We need to address this with the proper tooling. Don't you agree?
Thanks again, Ron
Okay, here are the snap shots of a crank sensor and a pump.
Please rate me now for my time and I can continue to assist you if you need me to.
That means nothing, are you willing to test these parts with a scope or not? Please let me know.
A lab scope that takes shots like I sent you. If they did something wrong during your last repair which is what this sounds like, I wouldn't know that, and that's usually the case too.
The security system will act intermittently too. It needs to be addressed.
I said it can act up intermittently
Okay at least have your mechanic to a reset for your security system. You can even try this one your self before you do that, see attachment. If that doesn't work, I can opt out to see if someone else can help you.