1998 VOLVO v70 xc Misfire Ignition problem

Post by **Ludermilch** » 12 Jun 2015, 11:51

Curious, I swapped out the coil to see if that worked. Still same problem. I have a fuel pump relay, is this the same as the injection relay?

Post by **Ludermilch** » 12 Jun 2015, 11:53

Not new cords, about 2 years

Post by **Ludermilch** » 12 Jun 2015, 11:54

I did discover the PCV valve connector not plugged in. Helped some.

Post by **erikv11** » 12 Jun 2015, 12:52

Fuel injector relay is different, it is a gray one under the fan shroud.

Post by **Ludermilch** » 15 Jun 2015, 08:48

Unable to find anything but the fan control and a vacuum solenoid, I was able to drive to Missouri. It isn't misfiring as often and I am under the impression that it is a fuel related problem.

Post by **erikv11** » 15 Jun 2015, 10:13

I just looked at my s70 you are right no fuel system relay there, I didn't realize the engine wiring harness was different there from an 850.

I couldn't find it, either there isn't one or it is tucked away somewhere else, the 850 part looks like this:

Post by **Ludermilch** » 16 Jun 2015, 20:00

Made it back home. Now to figure out what is going on.

Post by **Ludermilch** » 01 Nov 2015, 19:32

After much debate on what was causing my headache on my trip I have concluded it was the ignition cords aggravated by the thin air and heat. They were barely 2 year old cords but not Bougicord. Guess what. After returning home and visiting a local P&P, I found a new set of Bougicords on a car and put them on my wagon and all misfires went away. Thank you to all who weighed in on my problems.

Post by **abscate** » 01 Nov 2015, 21:12

Thanks for closing loop on this, I've changed thread to solved with solution.

Yet another case for Bougicord plug wires on these cars