85 gsl se wont start

IH8DSM · 03-10-2009, 02:18 AM

Ok so i was driving to work the other day not driving it hard or anything and it just dies on me, tryed to start it and nothing it revs to a grand then dies like someone unplugs it or soemthing. So i take it over jfaplanets house and we do everything we can think of, swapped out ecu, maf, o2 sensor, its getting spark and fuel, its getting the plugs wet so the injectors are spraying the timing is dead on and nothing wrong with the distributor, checked the fusible links, fuel filter, ignitors, the thermostat core or whatever its called. This is a 85 gsl se fuel injected with a fresh rebuilt motor with not even a thousand miles on it.

Like i said ill start it itll rev up to a grand and then just shut off, sorry for the long read but were running out of ideas, if anyone has any shout em out cause if i can't get it running again i might be in one of charles rent a rotarys (red fc vert)

djmtsu · 03-10-2009, 08:12 AM

Did you check the intake tube for cracks? Massive vacuum leak?

IH8DSM · 03-10-2009, 10:11 AM

Quote:

Originally Posted by djmtsu

Did you check the intake tube for cracks? Massive vacuum leak?

i looked when we swapped out the mafs and didn't see any cracks or loses vacuum hoses. its the weirdest thing it ran fine, great even and just died and now it won't even start don't understand it

djmtsu · 03-10-2009, 10:42 AM

Fuel pressure? Just because the plugs are wet does not meant the pump can maintain the needed PSI to keep the engine running.

IH8DSM · 03-11-2009, 12:11 AM

its getting almost 40 psi, the plugs being wet i was just saying its getting into the chamber.

fire85gslse · 03-12-2009, 05:43 PM

Try vacuums, also try putting jumper cables on the ground terminal on the battery and the other side on the frame, then try motor? Maybe you lost a ground and the ecu is not getting proper voltage.

Check pin out on ECU to see if your getting proper voltage.

When it revs can you hold the gas and it stay running?
If not check exhaust. Maybe its plugged up tight!

Hurry up and figure it out before it gets towed off.....

Last effort - Try bolting a carb up to it and see it it will run.

rx4ur7 · 03-14-2009, 01:42 AM

Also check your brake booster hoses. Is there power to the distributor with ignition on? I had one come in once that had an ignition switch go bad. Uncommon when these guys were younger but they are getting a bit long in the tooth now.
Exactly what were you doing when it died? Notice anything just before it stopped?

fire85gslse · 03-14-2009, 07:17 AM

it is the same problem that I had with my SE when I was trying to put the SE lower intake on my S4 block. There was something there creating a vacuum leak and well I had to put the S4 lower back on because I could not get it after 3-4 tries. So I still say Vacuum but it could be power. Have you checked the pin voltage at the ECU yet?
I tried to call you and charles with no luck. Even texted you!

IH8DSM · 03-16-2009, 12:47 AM

Quote:

Originally Posted by rx4ur7

Also check your brake booster hoses. Is there power to the distributor with ignition on? I had one come in once that had an ignition switch go bad. Uncommon when these guys were younger but they are getting a bit long in the tooth now.
Exactly what were you doing when it died? Notice anything just before it stopped?

ignition switch is good we checked that and it was running like a top no weird noises, was driving normal like 2 grand in 5th gear doing about 40-45 some where in there not revving high or anything and it just died.

Quote:

Originally Posted by fire85gslse

Try vacuums, also try putting jumper cables on the ground terminal on the battery and the other side on the frame, then try motor? Maybe you lost a ground and the ecu is not getting proper voltage.

Check pin out on ECU to see if your getting proper voltage.

When it revs can you hold the gas and it stay running?
If not check exhaust. Maybe its plugged up tight!

Hurry up and figure it out before it gets towed off.....

Last effort - Try bolting a carb up to it and see it it will run.

we did the jumper cables no difference, when it first died id be able to start it rev to a grand then just die now it wont even do that it just cranks. We're gonna try to check the exhaust this week and i still need to find the pin out

Quote:

Originally Posted by fire85gslse

it is the same problem that I had with my SE when I was trying to put the SE lower intake on my S4 block. There was something there creating a vacuum leak and well I had to put the S4 lower back on because I could not get it after 3-4 tries. So I still say Vacuum but it could be power. Have you checked the pin voltage at the ECU yet?
I tried to call you and charles with no luck. Even texted you!

yea we've been busy working, well charles has ive been supporting miller lite and such.

2gslse · 03-16-2009, 07:04 PM

Check the trailing ignition it also triggers the fuel pump to run also make sure all the wires on the trailing coil are clean and tight one of the spade type is the one for fuel pump.

rx4ur7 · 03-19-2009, 02:22 PM

Sounds electrical to just stop with no other symptoms.
Water temp sensor or connector, I have seen harness failure right behind the connector, internal, the insulation looked fine.
Oscillator and connector in front of the battery?
At this stage with the plugs fouling, you have tried a new set of NGK’s I’m sure.
Something to try with the fuel system, try clamping the fuel line off. I use a pair of those
small needle nose vise grips with fuel line on the jaws. Crank and see if it fires. If it does then open up the grips just a tad to be able to let through a little fuel. It may take a few tries to get it right. I perfected this procedure in dealing with the FC. If this works it can indicate an issue with the regulator and or damper. Sometimes it clears out injectors.
If you have been doing a lot of trying the exhaust can load up with fuel, disconnecting the exhaust from the manifold will bypass it for testing.
You might want to check wiring and signals for the air flow meter and control unit.

IH8DSM · 03-28-2009, 01:35 AM

ended up swapping out the fuel injection for a carb, started on the first crank, so im tired of messing with it need my dd back again so im ordering a carb set up for it. Should be on and tuned before the dragon. Thanks everyone for there help the blue cars gonna make it to the dragon if i have to tow it haha

fire85gslse · 03-28-2009, 05:24 AM

You also need to open her up on Road Atlanta in July. No steep cliffs
to fall off and stupid butts to run into you.

Sorry to hear the FI is gone. it probally had to do with ignition or fuel.

IH8DSM · 03-28-2009, 10:12 AM

were thinking fuel, and the more charles talked about carb the more fun it sounds haha

03-10-2009, 02:18 AM	#1
IH8DSM RCC Contributor Join Date: Mar 2008 iTrader: (0) Posts: 610 Rep Power: 17	85 gsl se wont start Ok so i was driving to work the other day not driving it hard or anything and it just dies on me, tryed to start it and nothing it revs to a grand then dies like someone unplugs it or soemthing. So i take it over jfaplanets house and we do everything we can think of, swapped out ecu, maf, o2 sensor, its getting spark and fuel, its getting the plugs wet so the injectors are spraying the timing is dead on and nothing wrong with the distributor, checked the fusible links, fuel filter, ignitors, the thermostat core or whatever its called. This is a 85 gsl se fuel injected with a fresh rebuilt motor with not even a thousand miles on it. Like i said ill start it itll rev up to a grand and then just shut off, sorry for the long read but were running out of ideas, if anyone has any shout em out cause if i can't get it running again i might be in one of charles rent a rotarys (red fc vert) __________________ 85 rx7 gsl-se - AA tags/ never ending project will never run

03-10-2009, 08:12 AM	#2
djmtsu My minds tellin' me no... Join Date: Feb 2008 Location: Murfreesboro, TN iTrader: (10) Posts: 4,043 Rep Power: 21	Did you check the intake tube for cracks? Massive vacuum leak? __________________ 1976 Mazda Cosmo RX-5 1976 Mazda Cosmo RX-5 2003 Toyota Tundra TRD 2015 Toyota 4Runner SR5

03-10-2009, 10:42 AM	#4
djmtsu My minds tellin' me no... Join Date: Feb 2008 Location: Murfreesboro, TN iTrader: (10) Posts: 4,043 Rep Power: 21	Fuel pressure? Just because the plugs are wet does not meant the pump can maintain the needed PSI to keep the engine running. __________________ 1976 Mazda Cosmo RX-5 1976 Mazda Cosmo RX-5 2003 Toyota Tundra TRD 2015 Toyota 4Runner SR5

03-11-2009, 12:11 AM	#5
IH8DSM RCC Contributor Join Date: Mar 2008 iTrader: (0) Posts: 610 Rep Power: 17	its getting almost 40 psi, the plugs being wet i was just saying its getting into the chamber. __________________ 85 rx7 gsl-se - AA tags/ never ending project will never run

03-12-2009, 05:43 PM	#6
fire85gslse RCC Addict Join Date: Feb 2008 Location: Middle TN iTrader: (0) Posts: 1,029 Rep Power: 18	Try vacuums, also try putting jumper cables on the ground terminal on the battery and the other side on the frame, then try motor? Maybe you lost a ground and the ecu is not getting proper voltage. Check pin out on ECU to see if your getting proper voltage. When it revs can you hold the gas and it stay running? If not check exhaust. Maybe its plugged up tight! Hurry up and figure it out before it gets towed off..... Last effort - Try bolting a carb up to it and see it it will run. __________________ I own A few Rotaries and Yes, I have a rotary problem. (SELLING OFF All my parts) 79SA(Respeed Car),93 FD (tweakit)

03-14-2009, 01:42 AM	#7
rx4ur7 Rotary since 1972 Join Date: Nov 2008 Location: Tucson iTrader: (0) Posts: 231 Rep Power: 17	Also check your brake booster hoses. Is there power to the distributor with ignition on? I had one come in once that had an ignition switch go bad. Uncommon when these guys were younger but they are getting a bit long in the tooth now. Exactly what were you doing when it died? Notice anything just before it stopped? Last edited by rx4ur7; 03-14-2009 at 02:32 AM..

03-14-2009, 07:17 AM	#8
fire85gslse RCC Addict Join Date: Feb 2008 Location: Middle TN iTrader: (0) Posts: 1,029 Rep Power: 18	it is the same problem that I had with my SE when I was trying to put the SE lower intake on my S4 block. There was something there creating a vacuum leak and well I had to put the S4 lower back on because I could not get it after 3-4 tries. So I still say Vacuum but it could be power. Have you checked the pin voltage at the ECU yet? I tried to call you and charles with no luck. Even texted you! __________________ I own A few Rotaries and Yes, I have a rotary problem. (SELLING OFF All my parts) 79SA(Respeed Car),93 FD (tweakit)

03-16-2009, 07:04 PM	#10
2gslse Rotary Fanatic Join Date: Apr 2008 Location: front royal va iTrader: (0) Posts: 440 Rep Power: 17	Check the trailing ignition it also triggers the fuel pump to run also make sure all the wires on the trailing coil are clean and tight one of the spade type is the one for fuel pump.

03-19-2009, 02:22 PM	#11
rx4ur7 Rotary since 1972 Join Date: Nov 2008 Location: Tucson iTrader: (0) Posts: 231 Rep Power: 17	Sounds electrical to just stop with no other symptoms. Water temp sensor or connector, I have seen harness failure right behind the connector, internal, the insulation looked fine. Oscillator and connector in front of the battery? At this stage with the plugs fouling, you have tried a new set of NGK’s I’m sure. Something to try with the fuel system, try clamping the fuel line off. I use a pair of those small needle nose vise grips with fuel line on the jaws. Crank and see if it fires. If it does then open up the grips just a tad to be able to let through a little fuel. It may take a few tries to get it right. I perfected this procedure in dealing with the FC. If this works it can indicate an issue with the regulator and or damper. Sometimes it clears out injectors. If you have been doing a lot of trying the exhaust can load up with fuel, disconnecting the exhaust from the manifold will bypass it for testing. You might want to check wiring and signals for the air flow meter and control unit. Last edited by rx4ur7; 03-30-2009 at 02:11 PM..

03-28-2009, 01:35 AM	#12
IH8DSM RCC Contributor Join Date: Mar 2008 iTrader: (0) Posts: 610 Rep Power: 17	ended up swapping out the fuel injection for a carb, started on the first crank, so im tired of messing with it need my dd back again so im ordering a carb set up for it. Should be on and tuned before the dragon. Thanks everyone for there help the blue cars gonna make it to the dragon if i have to tow it haha __________________ 85 rx7 gsl-se - AA tags/ never ending project will never run

03-28-2009, 05:24 AM	#13
fire85gslse RCC Addict Join Date: Feb 2008 Location: Middle TN iTrader: (0) Posts: 1,029 Rep Power: 18	You also need to open her up on Road Atlanta in July. No steep cliffs to fall off and stupid butts to run into you. Sorry to hear the FI is gone. it probally had to do with ignition or fuel. __________________ I own A few Rotaries and Yes, I have a rotary problem. (SELLING OFF All my parts) 79SA(Respeed Car),93 FD (tweakit)

03-28-2009, 10:12 AM	#14
IH8DSM RCC Contributor Join Date: Mar 2008 iTrader: (0) Posts: 610 Rep Power: 17	were thinking fuel, and the more charles talked about carb the more fun it sounds haha __________________ 85 rx7 gsl-se - AA tags/ never ending project will never run