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12-05-2007, 11:58 PM
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#1 |
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Stock
Join Date: Dec 2007
Location: Stilwell, KS
Posts: 5
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No spark mystery on 7mgte
I've lost spark on my 88 7mgte and have hit a wall in my diagnostics. I've got 12v at the 3 coil pack connectors and the ignitor, the resistance on the cps connector pins is all good, but no spark. I tried a back up coil pack, no help. The one thing I can't figure out how to test is for the signals the ignitor sends to the coil packs to fire the plugs. Any ideas? TIA
Jim G |
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12-06-2007, 10:07 AM
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#2 |
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7M POWAH! ;)
Join Date: Jun 2004
Location: New Zealand
Posts: 2,312
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have you tried wiggling the cps plug?
what codes have you got?
__________________
Please use the forum to ask your questions as they will get replied to much faster than pming me  Pics of my build. "Good girls are just bad girls that don't get caught" Do a diagnostic first! |
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12-06-2007, 12:44 PM
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#3 |
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Stock
Join Date: Dec 2007
Location: Stilwell, KS
Posts: 5
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No codes - I haven't had it started since disconnecting the battery to clean the terminals & check the cables. I'm suspicious of the cps plug/wiring after reading the tons of other posts on this topic, so I'll check that out next.
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12-06-2007, 09:24 PM
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#4 |
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Stock
Join Date: Dec 2007
Location: Stilwell, KS
Posts: 5
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Okay, cps connector/wires look good, so I decided to check the cps terminals at the ecu. Found 3 plug wasn't seated tight. Now I get spark, but it's weak & intermittent. BTW - the cps did test good at the ecu connector, so now what - ignitor?
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12-06-2007, 09:49 PM
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#5 |
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7M POWAH! ;)
Join Date: Jun 2004
Location: New Zealand
Posts: 2,312
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the cps wires directly at the cps plug generally naff out
usually a good wiggle will get the car going again
__________________
Please use the forum to ask your questions as they will get replied to much faster than pming me Pics of my build. "Good girls are just bad girls that don't get caught" Do a diagnostic first! |
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08-19-2009, 03:57 PM
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#6 |
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3" Exhaust
Join Date: May 2008
Location: Gaithersburg, Maryland
Posts: 63
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hey I have this problem. did you ever figure it out?
__________________
1991 Supra - Turbo - 5spd 60-1 upgraded turbo Lexus AFM 3" exhaust, 4" tip SAFC 2 550cc injectors (2 sets, venom direct fit, RC engineering) 2.5" intercooler and piping Aluminum radiator w/dual electric fans ARP bolts w/MHG Full-auto turbo timer Fidanza Flywheel & Stage 2 Clutch spark plugs and wires. power steering pump cold temp start switch engine top end rebuilt transmission opened up and inspected at a tranny shop when the flywheel and clutch installed last week. |
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