boost hits, cars dies

chillin943 · 08-16-2009, 01:26 AM

ok i have a 88 supra with a brand new oem engine. after i installed the engine the car ran excellent for a week and while driving it died out of the blue. the problem was the wiring was old, the plastic insulation was basically cumpling everytime you moved a wire. the wires for the dizzy were broken and not making a connection. so i put a few wires back together and after a month of playing with it i FINALLY got the car to start and run. its running very rich, and will rev up just fine. but under WOT (wide open throttle) the car goes to about 3 grand the turbo starts goin and the car just wont go any faster. if anyone has any pictures of there wiring on there distributor, it would be great. (like without the black wiring sheild so i can see the colors and where they go and connect) i can hook the wires up but not sure exactly which wires go together beause of the insulation had fallen off of the my orignal wiring. thanks

chillin943 · 08-16-2009, 10:10 PM

bump,

also wanted add that the car is running really rich. like idels at 1500 until you hit the gas and it idels at about 500 before stalling cause i think it basically flooding itself out. i heard something about a map sensor??? i checked mine and its pluged in and "i think" its workin properly. also my check engine light is on, can i tap the computer like a honda and count the blinks and look the code up?? any help guys?

this car only has 91K so im assumeing the computer and sensors are ok. but we kno what assuming can do for ya.

GettaRobo · 08-17-2009, 01:13 AM

Yes, you can check the error codes on your car. There should be a little rectangular diagnostic port near the fuse box under the hood. I believe you use a jumper on terminals Te1 (sometimes just T1) and E1 and turn your key to accessory I think and watch how many times it blinks. If your car is running rich, I would suspect it's the MAF. My car was running rich as well, so I changed it out with a new one. Other than running rich with the old MAF, the car ran fine.

scaggsj · 08-17-2009, 03:52 AM

I think your map is supposed to read 5 ohms open

chillin943 · 08-18-2009, 03:51 AM

aight cool ill check to see what is trippin the check engine light. if it says maf sensor ill just replace it. i mean hell ive already bought new coil packs, dizzy ect. but i still need to kno how the dizzy is wired up to the main harness. like i said my wires are dryrotted and the insulation had completly fallen off so i would like to see if anyone can snap a quick pick of there dizzy wiring to the main harness. im damn sure that would solve 99.0 percent of my problems. the car ran superb for a week and then i had the one broken wire and the more i move the other wires the worse the problem got with every wire near the dizzy. i have a huge birds nest for my dizzy wires now. any and all help is greatly appreciated

shiftysupra · 08-18-2009, 05:57 PM

you can find the wiring diagrams on the tsrm site...

chillin943 · 08-18-2009, 09:30 PM

Quote:

Originally Posted by shiftysupra

you can find the wiring diagrams on the tsrm site...

what is the tsrm?

btwilson86 · 08-18-2009, 11:00 PM

The TSRM is the factory repair manual. This is the repair book that you can go buy from Toyota for about $250. Someone was nice enough to scan his entire repair manual for a 1990 Supra, save it in a pdf file, and post it online for Supra enthusiasts to reference while repairing their cars. You can find the online TSRM here:

TSRM

Before posting, please be sure to explore the forums here. The information above is in several posts, including the one entitled "Please Read This First" at the top of the main MKIII Supra page.

chillin943 · 08-19-2009, 03:42 AM

well thanks for the help. still at square one. except i kno what a tsrm is now.

Kevin · 08-19-2009, 01:40 PM

check for codes? check your afm and afm connector. is ur cps good? timing is good? boost leak? intake leak?

08-16-2009, 01:26 AM	#1
chillin943 Stock Join Date: Aug 2009 Location: home Posts: 5	boost hits, cars dies ok i have a 88 supra with a brand new oem engine. after i installed the engine the car ran excellent for a week and while driving it died out of the blue. the problem was the wiring was old, the plastic insulation was basically cumpling everytime you moved a wire. the wires for the dizzy were broken and not making a connection. so i put a few wires back together and after a month of playing with it i FINALLY got the car to start and run. its running very rich, and will rev up just fine. but under WOT (wide open throttle) the car goes to about 3 grand the turbo starts goin and the car just wont go any faster. if anyone has any pictures of there wiring on there distributor, it would be great. (like without the black wiring sheild so i can see the colors and where they go and connect) i can hook the wires up but not sure exactly which wires go together beause of the insulation had fallen off of the my orignal wiring. thanks

08-18-2009, 11:00 PM	#8
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	The TSRM is the factory repair manual. This is the repair book that you can go buy from Toyota for about $250. Someone was nice enough to scan his entire repair manual for a 1990 Supra, save it in a pdf file, and post it online for Supra enthusiasts to reference while repairing their cars. You can find the online TSRM here: TSRM Before posting, please be sure to explore the forums here. The information above is in several posts, including the one entitled "Please Read This First" at the top of the main MKIII Supra page. __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

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08-16-2009, 10:10 PM	#2
chillin943 Stock Join Date: Aug 2009 Location: home Posts: 5	bump, also wanted add that the car is running really rich. like idels at 1500 until you hit the gas and it idels at about 500 before stalling cause i think it basically flooding itself out. i heard something about a map sensor??? i checked mine and its pluged in and "i think" its workin properly. also my check engine light is on, can i tap the computer like a honda and count the blinks and look the code up?? any help guys? this car only has 91K so im assumeing the computer and sensors are ok. but we kno what assuming can do for ya.

08-17-2009, 01:13 AM	#3
GettaRobo 3" Exhaust Join Date: Apr 2009 Location: Saskatoon, SK Posts: 65	Yes, you can check the error codes on your car. There should be a little rectangular diagnostic port near the fuse box under the hood. I believe you use a jumper on terminals Te1 (sometimes just T1) and E1 and turn your key to accessory I think and watch how many times it blinks. If your car is running rich, I would suspect it's the MAF. My car was running rich as well, so I changed it out with a new one. Other than running rich with the old MAF, the car ran fine.

08-17-2009, 03:52 AM	#4
scaggsj 3" Exhaust Join Date: Aug 2009 Location: Florida Posts: 87	I think your map is supposed to read 5 ohms open

08-18-2009, 03:51 AM	#5
chillin943 Stock Join Date: Aug 2009 Location: home Posts: 5	aight cool ill check to see what is trippin the check engine light. if it says maf sensor ill just replace it. i mean hell ive already bought new coil packs, dizzy ect. but i still need to kno how the dizzy is wired up to the main harness. like i said my wires are dryrotted and the insulation had completly fallen off so i would like to see if anyone can snap a quick pick of there dizzy wiring to the main harness. im damn sure that would solve 99.0 percent of my problems. the car ran superb for a week and then i had the one broken wire and the more i move the other wires the worse the problem got with every wire near the dizzy. i have a huge birds nest for my dizzy wires now. any and all help is greatly appreciated

08-18-2009, 05:57 PM	#6
shiftysupra 3" Exhaust Join Date: Jan 2006 Location: Arizona Posts: 96	you can find the wiring diagrams on the tsrm site...

08-19-2009, 03:42 AM	#9
chillin943 Stock Join Date: Aug 2009 Location: home Posts: 5	well thanks for the help. still at square one. except i kno what a tsrm is now.

08-19-2009, 01:40 PM	#10
Kevin 3" Exhaust Join Date: Apr 2009 Location: Ontario, Canada Posts: 194	check for codes? check your afm and afm connector. is ur cps good? timing is good? boost leak? intake leak?