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Analyzing ignition misfires - a picture shows why the Casper's tester works!
I haven't touched my car in over a month, as I'd been a bit upset the last time it was out. The car felt like it had a 'miss', but only at high boost. That had me starting to suspect the fuel pump, since that is where the fuel system would be taxed the most. Of course, that is where the ignition is taxed the most as well. So I finally broke out the Casper's tester and had a look at things. This is by far the best way to analyze things. The proof is in the pics. The 5-2 pair is simply not firing. If I turn it down to a low RPM, it does fire...very weakly. At high RPMs it never fired at all. This is a new coil, but an older module. Both GM/Delco parts. Worked fine on the street and at street boost levels, but up at 20+ PSI, would stumble like crazy. At this time, I don't know which part is the problem: coil or module. However I will check them and change what needs to be changed. Larger turbo is going on while the car is down as well.
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Scott Keller - GNTTYPE Founder & Moderator
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Re: Analyzing ignition misfires - a picture shows why the Casper's tester works!
nice.. this should be a sticky
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#3
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Re: Analyzing ignition misfires - a picture shows why the Casper's tester works!
Found this user document. www.installationinstructions.com/102020.pdf
Now, where and how much are these? Anyone have one they want to rent or let me borrow in the Michigan area?
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IL KIM 85 GN w/86 motor, TRW pistons, Weber 206 billet roller cam, EGR welded, o/sized valves, 130psi springs, roller rockers, 3000 conv, adj w/gate, FPR, custom rad, KB ram air, ported, KB headers, Walbro 340M/hotwire, 60lb Hi Z, CPT66bb |
#4
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Re: Analyzing ignition misfires - a picture shows why the Casper's tester works!
Quote:
I was thinking the same thing for the Akron, OH area. |
#5
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Re: Analyzing ignition misfires - a picture shows why the Casper's tester works!
Ryan! Thanks. I noticed Caspers sells a replacement coil pack for less than the cost of the tool! LOL
__________________
IL KIM 85 GN w/86 motor, TRW pistons, Weber 206 billet roller cam, EGR welded, o/sized valves, 130psi springs, roller rockers, 3000 conv, adj w/gate, FPR, custom rad, KB ram air, ported, KB headers, Walbro 340M/hotwire, 60lb Hi Z, CPT66bb |
#6
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Re: Analyzing ignition misfires - a picture shows why the Casper's tester works!
Its not always the pack. In my case, only changing both fixed the problem.
__________________
Scott Keller - GNTTYPE Founder & Moderator
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