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No start with power surges during cranking

No start with power surges during cranking

Old 05-13-2015, 11:17 PM
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Default No start with power surges during cranking

I've got a 2002 S4 TIP that will crank but not fire off. It also power surges hard and all the lights dim while cranking. I've researched this site and other forums since Monday when she died of me. I figured it was time to signup and ask the question one what to do next. I've tested the fuel pump and it's running 3.9-4 bar, tried but returned a fuel pressure regulator when I had no difference, having problems with cylinder 5 not firing so I got a new ICM for that bank, VAGCOM only has said a misfire with cylinder 2 and did a crankshaft position sensor.

Last Monday I was leaving to go to work and as soon as I started it I could tell it was misfiring a little. When I pulled out of my garage and gave it a little gas the misfire was very noticeable so I circled my complex parking lot and put her back in the garage. That is when I diagnosed it and it said Cylinder 2 misfire. That's when I discovered cylinder 5 was misfiring not 2. Got a new ICM and every cylinder has spark. I'm lost now and don't know what ave to go down next. Any input is appreciated on this on.
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