Toyota Celica Supra Forum banner

1 - 5 of 5 Posts

·
Premium Member
Joined
·
252 Posts
Discussion Starter #1
Troubleshooting this electrical issue on my 1985 P type has been fun but the hours are turning into days and I could use some help.

It starts and dies right away. Seems like the cold start injector primes it and it runs for about 2 seconds and dies. Here is what I have done so far:

Replaced fuel pump (it needed it anyway since filter was plugged)
Replaced fuel filter (not fun but not as bad as the starter R&R)
Swapped distributor
Swapped ECU
Swapped cold start injector
Swapped AFM
Swapped a 1992 Camry alternator in
Swapped Igniter (the OEM had a melted down coil so some stuff was overheated)
Jumped the fuel pump relay at the AFM
Checked for good fuel pressure
Fuses check OK

The E1 at the ECU is missing as shown in picture. Is that normal and is the E2 used just the same?

Using a 1987 Toyota Diagnosis Manual for the 5M-GE

page 4- 4 # 5 I noted the following using E2:
Key out = .18vdc
Key on = 7.5vdc
Eng crank drops to 5vdc and flashes to zero and back to 5vdc

page 4-3 # 2 I noted the following
using E2 to IGf zero volts showing and the manual says "there is probably a short"

My current guess is that the injectors are not firing due to a short. The battery drains down in 2-3 days. I had it running great for a couple of weeks and then the gremlin re-appeared same as before.

What should I look for or try next?
David
 

Attachments

·
Premium Member
Joined
·
252 Posts
Discussion Starter #2
The E1 at the ECU is missing as shown in picture. Is that normal and is the E2 used just the same?
 

·
Premium Member
Joined
·
5,934 Posts
Therapy. Good one.
Do the EASY stuff, first. This may help:
 

·
Registered
Joined
·
77 Posts
Could it be a stupid thing as a bad ignition switch? Check 'on' voltage at the igniter.
 

·
Premium Member
Joined
·
252 Posts
Discussion Starter #5
Thanks Dave and Beernuts,

I am going to perform a few of the checks suggested.

I am still suspicious about the missing E1 on the large connector going to the ECU. Does mine look like yours? The diagnosis manual has a bunch of checks between E1 and there is no wire in the connector.
 

Attachments

1 - 5 of 5 Posts
Top