'99 S70 AWD won't start, cranks fine

Post by **burnout8488** » 31 Oct 2011, 20:47

All coil packs are functional. I have fuel, air, and spark. This is killing me.

Post by **jblackburn** » 31 Oct 2011, 21:45

At this point, it sounds like the only thing missing is compression. You can try a compression test, or try the oil in the cylinders trick to see if you can get it going.

As long as the crankshaft sensor and coil packs are all functioning, you should have spark at the right time.

Post by **burnout8488** » 31 Oct 2011, 21:49

For some reason I overlooked a compression test. I'll rent the tester from Autozone tomorrow. It just makes no sense to me why it would do this out of nowhere. The plugs were covered in gas so the rings probably are too.

I will do anything and everything in my power to avoid having it towed to the dealer so they can hook it up to VIDA and diagnose it. If I have to buy VIDA, that will probably be cheaper...right?

Post by **burnout8488** » 31 Oct 2011, 21:52

One more question: Can the CVVT solenoid cause this? I only had the rough running at startup, so it wouldn't have had time to throw the code probably... and now it won't start at all.

Post by **jblackburn** » 31 Oct 2011, 22:25

That solenoid shouldn't affect it. It just moves the exhaust cam slightly like VTEC in a Honda does to help improve the powerband at both ends.

Post by **burnout8488** » 01 Nov 2011, 13:02

Thought so - thanks for the help so far.

I can't think of many other things that affect timing. Perhaps both of my MAF sensors are bad, and I need to try a new one too.

Post by **burnout8488** » 01 Nov 2011, 16:31

I put another S80 MAF sensor on today, but did NOT connect it to the intake plumbing. The car fired SMOOTHLY up to 1000rpm for about 1 second and actually ran! Then it died because it wasn't hooked up to the intake pipe.

I then cleaned it, and properly installed it onto the airbox and intake pipe. The car now won't start and is stumbling again.

Does anyone think the cleaning could have actually ruined the sensor? I used CRC MAF sensor cleaner, I've always used this stuff and it always works great.

OR: Is my car frying MAF sensors for some reason? I'd buy a brand new one if I thought it wouldn't get ruined.

Post by **burnout8488** » 01 Nov 2011, 18:26

I took a video of the hard starting, take a gander!

One person on VS suggested the PNP switch, does this sound reasonable?

Nuttydriver · Post by **Nuttydriver** » 01 Nov 2011, 18:37

It almost sounds like my truck when I got bad gas. I filled it up right after they filled their tanks and got a bunch of water in my tank. If your fuel guage is working it looks like you have plenty of room to drain out the tank and try some fresh gas.

Post by **burnout8488** » 01 Nov 2011, 18:38

I'm on the last few gallons of what was an 18 gallon full fill, and I haven't experienced any problems in the last month using this same gas. Perhaps somethings in the tank........ I'll throw some in from my gas can and see what happens.

'99 S70 AWD won't start, cranks fine

Re: '99 S70 AWD won't start, cranks fine