Toyota MR2 Message Board - View Single Post

speedygonzalez · 12-05-2008, 07:49 PM

I really need help on this one!! i just recently rebuilt my 87 n/a MR2 motor. it cranks, but engine sputters and the rpm is bouncing. the timing is set to factory specs. just found out that the #1 fuel injector plug is not working. i checked with a multimeter and i'm reading 3 ohms, but when i checked the pins inside the connector with a tester (continuity), the light bulb does not turn on. so i figured that is not gettin 12v. i checked the two wires inside the plug all the way and they are not broken or damaged. the two wires inside the plug are 1 black and 1 green with red stripes. the black wire is routed to the starter while the green with red stripes is connected to the "start injector time switch" plug. i checked the injector time switch pins with the multimeter and is reading 40 ohms according to my haynes book specs. so i know that switch is working. also, i replaced the ECU for a new one and still not working. I give up!! what the heck is going on!! i would really appreciate it if somebody would give me advice or help me on this issue!!

12-05-2008, 07:49 PM	#1 (permalink)
speedygonzalez Toyota Freak Join Date: Jul 2008 Location: Cape Coral, FL Posts: 26 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	#1 fuel injector plug not working I really need help on this one!! i just recently rebuilt my 87 n/a MR2 motor. it cranks, but engine sputters and the rpm is bouncing. the timing is set to factory specs. just found out that the #1 fuel injector plug is not working. i checked with a multimeter and i'm reading 3 ohms, but when i checked the pins inside the connector with a tester (continuity), the light bulb does not turn on. so i figured that is not gettin 12v. i checked the two wires inside the plug all the way and they are not broken or damaged. the two wires inside the plug are 1 black and 1 green with red stripes. the black wire is routed to the starter while the green with red stripes is connected to the "start injector time switch" plug. i checked the injector time switch pins with the multimeter and is reading 40 ohms according to my haynes book specs. so i know that switch is working. also, i replaced the ECU for a new one and still not working. I give up!! what the heck is going on!! i would really appreciate it if somebody would give me advice or help me on this issue!!