Misfires and maybe more...
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Joined: Mar 2017
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Misfires and maybe more...
So.. quick about the car, 2003 supercharged V2 Vortech, hondata ecu, Evans tune. 67k Miles, 10 psi.
So, long story short the car had a misfire when I bought it last late spring and I took it to Billman for misfire fix, tct, valves, coilovers, and general tune up. He switched me over to stock spark plugs and gave me a used coil pack and she was running strong. Fast forward about 400 miles and the car starts having hesitation when pushing hard in the upper rpms. Soon after that one day it gets a horrible misfire (sounded like a Subaru) and I towed it home and switched out coil packs to new. She drives great for another 200 miles and then 3 blocks from my home she craps out again and sounds like a Subaru. I figure ok let’s go back to colder plugs and so I changed them today with the forum recommended plugs for Super/turbo charged cars and she sounds even worse and now won’t even turn over. The spark plugs that I took out today that had about 600 miles on them were black which I assume is running rich because the compression was tested when I bought it 900 miles ago and was good. I took a video and hopefully someone with keen ears can hear something going on there besides my cold sniffle heavy breathing. The problem is I can’t move this car and the closest expert is 75 miles away so I just want to get her running as a start. Thanks!!
one more thing, when I turn the key I can hear the fuel pump “priming” from the rear prior to starting.
So, long story short the car had a misfire when I bought it last late spring and I took it to Billman for misfire fix, tct, valves, coilovers, and general tune up. He switched me over to stock spark plugs and gave me a used coil pack and she was running strong. Fast forward about 400 miles and the car starts having hesitation when pushing hard in the upper rpms. Soon after that one day it gets a horrible misfire (sounded like a Subaru) and I towed it home and switched out coil packs to new. She drives great for another 200 miles and then 3 blocks from my home she craps out again and sounds like a Subaru. I figure ok let’s go back to colder plugs and so I changed them today with the forum recommended plugs for Super/turbo charged cars and she sounds even worse and now won’t even turn over. The spark plugs that I took out today that had about 600 miles on them were black which I assume is running rich because the compression was tested when I bought it 900 miles ago and was good. I took a video and hopefully someone with keen ears can hear something going on there besides my cold sniffle heavy breathing. The problem is I can’t move this car and the closest expert is 75 miles away so I just want to get her running as a start. Thanks!!
one more thing, when I turn the key I can hear the fuel pump “priming” from the rear prior to starting.
Thread Starter
Joined: Mar 2017
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no oil residue. I do hear the fuel pump whine when I press the ignition, not sure if that is normal for a higher output fuel pump. I am going to do the compression test today or tomorrow morning but I never money shifted in the car and it seems the new coil packs solved the issue before it misfired again a couple hundred miles after. The other thing is that my A/C and heat both quit working right before the misfires so not sure if that is relevant.
Thread Starter
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Joined: Aug 2016
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From: In BOOST
Billman recommended it be idling then you rev it up to 2000rpm and tap it with a screwdriver for 20 seconds or so. You could remove it completely to whack it against the floor or somewhere but don't overdo it lol.
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Thread Starter
Joined: Mar 2017
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im also thinking fuel pump because there is no steady check engine light and before the car quit on me, it had a blinking CEL while misfiring/ sounding like a Subaru STI
Last edited by 2015GTRBE; Nov 7, 2018 at 12:50 PM.
Joined: Aug 2016
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From: In BOOST
lol stomp it like office space? So update, I sprayed starting fluid in the throttle body and it came to life for a few seconds if I held the start button for 4-5 seconds. Fuel pump?
im also thinking fuel pump because there is no steady check engine light and before the car quit on me, it had a blinking CEL while misfiring/ sounding like a Subaru STI
Thread Starter
Joined: Mar 2017
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[quote=RolanTHUNDER;24530613]So the starting fluid cleaned up the IM some. Have you checked your IACV? that won't necessarily contribute to actual misfires on its own though. Bad tank of gas maybe? Has your car ever sat un-driven for an extended period of time?[/
Last edited by 2015GTRBE; Nov 8, 2018 at 02:40 PM.