no spark out of ideas.

BrunoD · 03-30-2009, 11:54 PM

figured id try another forum since everyone on mine seems to be stumped. i have an 86.5 supra that i dropped a jdm 7mgte out of a 87-88 supra in. the swap came with engine wiring harness transmission computer and igniter. all i had to do was drop it in. well i did that. everything is connected and i have no spark. the coils tested good. the cam sensor tested good as well. i replaced the igniter and still no spark. someone have any ideas?

Vacationtime247 · 03-31-2009, 03:54 AM

Test for voltage at the coil. If there is no voltage going in to the coil, there obviously won't be any spark coming out. Pull off the distributor cap, is the rotor in place?

Best way to test for spark is to pull out a spark plug, insert spark plug into mouth with plug wire still connected, have a friend turn over the engine. If you spit the spark plug out, you got spark. lol

VT247

BrunoD · 03-31-2009, 04:26 AM

thats a great idea. except for the fact it doesnt have a distributor. but i did try the spark plug thing. was still in my mouth. still no spark. and there is power going to all 3 of the coils.

Vacationtime247 · 03-31-2009, 07:59 AM

The coils should get a signal from the computer telling them when to fire. Have you checked for signal when the engine is turning over?
VT247

BrunoD · 04-02-2009, 01:33 AM

yea i checked it. im not getting anything. what i did was pulled off the 2 pin connector found my batt voltage then put my dvom lead into the other connector cranked it over and nothing.

Vacationtime247 · 04-02-2009, 03:41 AM

What sensor tells the computer when to give the coils a signal on the motor you have installed? Is it a cam position sensor? A Crank sensor? Check for proper voltage out at that location with the engine turning over. Another thought is to make sure you have all your grounds. Computers and sensors don't act right without a good ground.
VT247

03-30-2009, 11:54 PM	#1
BrunoD Stock Join Date: Mar 2009 Location: minnesota Posts: 7	no spark out of ideas. figured id try another forum since everyone on mine seems to be stumped. i have an 86.5 supra that i dropped a jdm 7mgte out of a 87-88 supra in. the swap came with engine wiring harness transmission computer and igniter. all i had to do was drop it in. well i did that. everything is connected and i have no spark. the coils tested good. the cam sensor tested good as well. i replaced the igniter and still no spark. someone have any ideas?

04-02-2009, 03:41 AM	#6
Vacationtime247 3" Exhaust Join Date: Feb 2009 Location: Muncie, IN Posts: 86	Hope I'm helping..... What sensor tells the computer when to give the coils a signal on the motor you have installed? Is it a cam position sensor? A Crank sensor? Check for proper voltage out at that location with the engine turning over. Another thought is to make sure you have all your grounds. Computers and sensors don't act right without a good ground. VT247

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03-31-2009, 03:54 AM	#2
Vacationtime247 3" Exhaust Join Date: Feb 2009 Location: Muncie, IN Posts: 86	Test for voltage at the coil. If there is no voltage going in to the coil, there obviously won't be any spark coming out. Pull off the distributor cap, is the rotor in place? Best way to test for spark is to pull out a spark plug, insert spark plug into mouth with plug wire still connected, have a friend turn over the engine. If you spit the spark plug out, you got spark. lol VT247

03-31-2009, 04:26 AM	#3
BrunoD Stock Join Date: Mar 2009 Location: minnesota Posts: 7	thats a great idea. except for the fact it doesnt have a distributor. but i did try the spark plug thing. was still in my mouth. still no spark. and there is power going to all 3 of the coils.

03-31-2009, 07:59 AM	#4
Vacationtime247 3" Exhaust Join Date: Feb 2009 Location: Muncie, IN Posts: 86	The coils should get a signal from the computer telling them when to fire. Have you checked for signal when the engine is turning over? VT247

04-02-2009, 01:33 AM	#5
BrunoD Stock Join Date: Mar 2009 Location: minnesota Posts: 7	yea i checked it. im not getting anything. what i did was pulled off the 2 pin connector found my batt voltage then put my dvom lead into the other connector cranked it over and nothing.