Engine still wont start 87 supra 7mge

lilsmitty · 12-29-2005, 05:27 PM

OK i put a new engine in my car. Its all in i got the last parts last night n was up all night trin to get it to start but it fires for like 2 seconds and shuts off... just wont stay running any ideas? i tried almost everything witht the timming

Bullz_EyE · 12-29-2005, 07:29 PM

Engines need 3 things to start. Compression, fuel, and spark. Time to start process of elimination. If you have all 3 your timing may be off or something may be wrong with a sensor or the ECU.

88Supraboy · 01-01-2006, 05:08 PM

check the Mass Air Flow sensor, if its not working right the car will start then die right away because its wating for a signal from the sensor. I had mine off once and it was doing it, i didnt understand why it would die but thats the whole reason for the sensor.

Good Luck

mattsmall · 01-01-2006, 08:46 PM

iv got an extra ecu for a 7mge with a manual trans 15 and ill ship it out to you.

TONY! · 01-01-2006, 10:13 PM

Have you checked for any codes?
If you have not, this may be of help:
http://www.cygnusx1.net/supra/techti...rrorcodes.html

If you have, did you get any codes?

rnoswal · 01-02-2006, 01:40 AM

Did it run with the old engine? It does sound like the airflow meter. The cold start injector is getting it started but then no signal to the rest of the injectors to keep it going. Try to make sure there are no big air leaks anywhere.

Russ

12-29-2005, 05:27 PM	#1
lilsmitty Intake Join Date: Jul 2005 Posts: 35	Engine still wont start 87 supra 7mge OK i put a new engine in my car. Its all in i got the last parts last night n was up all night trin to get it to start but it fires for like 2 seconds and shuts off... just wont stay running any ideas? i tried almost everything witht the timming

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12-29-2005, 07:29 PM	#2
Bullz_EyE 3" Exhaust Join Date: Oct 2005 Location: San Diego, CA Posts: 238	Engines need 3 things to start. Compression, fuel, and spark. Time to start process of elimination. If you have all 3 your timing may be off or something may be wrong with a sensor or the ECU.

01-01-2006, 05:08 PM	#3
88Supraboy 3" Exhaust Join Date: Oct 2005 Location: Michigan Posts: 55	check the Mass Air Flow sensor, if its not working right the car will start then die right away because its wating for a signal from the sensor. I had mine off once and it was doing it, i didnt understand why it would die but thats the whole reason for the sensor. Good Luck

01-01-2006, 08:46 PM	#4
mattsmall Stock Join Date: Jan 2006 Location: maryland Posts: 17	iv got an extra ecu for a 7mge with a manual trans 15 and ill ship it out to you.

01-01-2006, 10:13 PM	#5
TONY! 12psi boost Join Date: Sep 2005 Location: Troy, NY 12180 Posts: 353	Have you checked for any codes? If you have not, this may be of help: http://www.cygnusx1.net/supra/techti...rrorcodes.html If you have, did you get any codes?

01-02-2006, 01:40 AM	#6
rnoswal Lexus & 550's Join Date: Apr 2005 Location: Bossier City LA Posts: 556	Did it run with the old engine? It does sound like the airflow meter. The cold start injector is getting it started but then no signal to the rest of the injectors to keep it going. Try to make sure there are no big air leaks anywhere. Russ