Car won't stay running! W00t!

MidnightOwl · 05-04-2008, 02:48 PM

So I finished putting the S5 turbo into my S4 TII, and now I'm having a little bit of trouble. First of all, the engine is an 87 Turbo swapped into an 88 vert and has the full emissions removal. I put an S5 turbo on it a few weeks ago, and finished up the misc stuff on it today.

SO, I get in the car and try to start it but forgot that I robbed some fuses from under the dash. Replace those, and the car cranks and runs. Well after running for about 10-15 seconds, the engine dies. The car engine sounds fine while it's running, but after a few seconds it cuts off. So, the car cranks every time, but won't stay running for more than 10-15 seconds.

Ender · 05-04-2008, 03:25 PM

Which ECU and engine wiring harness are you using? Do you have the OMP in operation? Have you tried to grab any of the ECU error codes?

http://www.rotorwiki.com/index.php/86-88_Error_Codes
http://www.rotorwiki.com/index.php/89-91_Error_Codes

Apac tii · 05-04-2008, 05:40 PM

Did the car run before you put the s5 turbo in?

MidnightOwl · 05-05-2008, 12:24 PM

Yeah, the car ran fine before I installed the S5 turbo. The old turbo was bad, so I had to replace it.

I can't remember the ECU # off the top of my head, but it's the ECU and harness that came with the motor. I pulled the engine and everything out of a donor car and swapped it over. Like I said before, the car ran perfectly fine before swapping the turbos.

I haven't tried to pull codes, I had a wedding to go to last night and it cut short my time to work on the car.

I'm just seeing if anyone has a possible guess as to what could be the culprit. I can't really test for a vacuum leak because the car only runs for about 10 seconds. The car will idle fine during those 10 seconds, but just die.

Ender · 05-05-2008, 05:05 PM

There's an intake pressurizer a guy sells online, you can pressurize your intake with the car off (INVALUABLE RESOURCE, GET ONE). I don't have a link off the top of my head, but I don't think it's too hard to find. They only cost ~$25.

TehMonkay · 05-05-2008, 05:30 PM

Make sure the MAF is plugged in, sounds like its not plugged in, since the MAF is responsible for turning the fuel pump on after starting.

If not try jumpering the fuel pump check connector.

MidnightOwl · 05-05-2008, 08:11 PM

Checked the MAF, it wasn't plugged in all the way...I haven't cranked it because I checked that while walking out the door to dinner. Gonna see if that fixed it tomorrow.

TehMonkay · 05-05-2008, 08:15 PM

I will pretty much guarantee that will fix it as long as the connector wasnt damaged.

Phoenix7 · 05-05-2008, 08:16 PM

TOMORROW????? The SUSPENSE WILL KEEP ME UP ALL NIGHT!!!!!!!!!!!!

MidnightOwl · 05-06-2008, 10:52 AM

Yeah, it runs! I guess I knocked the plug loose putting it back together. OH WELL! It runs!!! The only problem is the gasket on the oil feed is leaky! Oh noes! Time to fix that! Guess I can drive it around the neighborhood now! W00T!!!!

05-04-2008, 02:48 PM	#1
MidnightOwl BAND. You got talent. Join Date: Feb 2008 Location: Atlanta, GA Posts: 50 Rep Power: 18	Car won't stay running! W00t! So I finished putting the S5 turbo into my S4 TII, and now I'm having a little bit of trouble. First of all, the engine is an 87 Turbo swapped into an 88 vert and has the full emissions removal. I put an S5 turbo on it a few weeks ago, and finished up the misc stuff on it today. SO, I get in the car and try to start it but forgot that I robbed some fuses from under the dash. Replace those, and the car cranks and runs. Well after running for about 10-15 seconds, the engine dies. The car engine sounds fine while it's running, but after a few seconds it cuts off. So, the car cranks every time, but won't stay running for more than 10-15 seconds. __________________ 88 Turbo Vert - mostly stock, S5 turbo, full exhaust, Greddy Profec B Spec II, full emissions removal 90 240sux - daily driver of DOOM. www.daviddrinkard.com

05-04-2008, 05:40 PM	#3
Apac tii Rotary Fan in Training Join Date: Mar 2008 Location: Indiana Posts: 38 Rep Power: 0	Did the car run before you put the s5 turbo in? __________________ 1988 Mazda RX-7 T2(list of mods here) http://designengineeringworks.com/project_cars.php 2004 Saturn Ion Redline(dd) 1999 Mitsubishi Galant V6(the backup beater)

05-05-2008, 12:24 PM	#4
MidnightOwl BAND. You got talent. Join Date: Feb 2008 Location: Atlanta, GA Posts: 50 Rep Power: 18	Yeah, the car ran fine before I installed the S5 turbo. The old turbo was bad, so I had to replace it. I can't remember the ECU # off the top of my head, but it's the ECU and harness that came with the motor. I pulled the engine and everything out of a donor car and swapped it over. Like I said before, the car ran perfectly fine before swapping the turbos. I haven't tried to pull codes, I had a wedding to go to last night and it cut short my time to work on the car. I'm just seeing if anyone has a possible guess as to what could be the culprit. I can't really test for a vacuum leak because the car only runs for about 10 seconds. The car will idle fine during those 10 seconds, but just die. __________________ 88 Turbo Vert - mostly stock, S5 turbo, full exhaust, Greddy Profec B Spec II, full emissions removal 90 240sux - daily driver of DOOM. www.daviddrinkard.com

05-05-2008, 05:30 PM	#6
TehMonkay Rotary Fanatic Join Date: Apr 2008 Location: Louisville, KY Posts: 302 Rep Power: 18	Make sure the MAF is plugged in, sounds like its not plugged in, since the MAF is responsible for turning the fuel pump on after starting. If not try jumpering the fuel pump check connector. __________________ My car blows up everytime I start it, it's rotary

05-05-2008, 08:11 PM	#7
MidnightOwl BAND. You got talent. Join Date: Feb 2008 Location: Atlanta, GA Posts: 50 Rep Power: 18	Checked the MAF, it wasn't plugged in all the way...I haven't cranked it because I checked that while walking out the door to dinner. Gonna see if that fixed it tomorrow. __________________ 88 Turbo Vert - mostly stock, S5 turbo, full exhaust, Greddy Profec B Spec II, full emissions removal 90 240sux - daily driver of DOOM. www.daviddrinkard.com

05-05-2008, 08:15 PM	#8
TehMonkay Rotary Fanatic Join Date: Apr 2008 Location: Louisville, KY Posts: 302 Rep Power: 18	I will pretty much guarantee that will fix it as long as the connector wasnt damaged. __________________ My car blows up everytime I start it, it's rotary

05-06-2008, 10:52 AM	#10
MidnightOwl BAND. You got talent. Join Date: Feb 2008 Location: Atlanta, GA Posts: 50 Rep Power: 18	Yeah, it runs! I guess I knocked the plug loose putting it back together. OH WELL! It runs!!! The only problem is the gasket on the oil feed is leaky! Oh noes! Time to fix that! Guess I can drive it around the neighborhood now! W00T!!!! __________________ 88 Turbo Vert - mostly stock, S5 turbo, full exhaust, Greddy Profec B Spec II, full emissions removal 90 240sux - daily driver of DOOM. www.daviddrinkard.com

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