The unfixable mystery problem

jcastro · 07-22-2009, 09:11 PM

try doing a smog check and ask to check ur vacume lines if it dosent pass the smog ull at lest have a better idea of wut it is and im pretty sure thell tell u whats wrong

86.5supra · 07-23-2009, 03:47 AM

i had the same problem after i had my 7mgte rebuilt. the shop couldnt figure it out so they took the motor out tore it apart and put it back in the car. It turned out to be a bad throttle body and mass air. hope this helps

GettaRobo · 08-05-2009, 07:31 AM

Well, today I picked up my supra from the shop it's been at. The mechanic has officially given up on the car. He can only think that there may be a bad connection in the wiring system, but he's not sure. I also bought a speed sensor off of www.rockauto.com , but it does not fit in my car. So now I'm stuck with a broken car and a speed sensor that does not fit. Luckily I can return it. I've been having a hell of a time trying to find a speed sensor for that car. I basically want to replace it before I try anything else with the car since it's the 'easiest' to get at. The part number is 89411-30090 and upon further investigation, apparently a 30091 would work as well... If anyone knows where I might be able to obtain this part, it would be greatly appreciated. Aside from that, it looks like I may have to take a peak at the throttle body.

P.S sorry for the long delay in updates... I was on holidays and was only able to steal a wireless highspeed connection a couple times

GettaRobo · 08-16-2009, 02:41 AM

For anyone interested, I have uploaded a couple videos on youtube. The first is of the car running fine up to 4000 RPM and then as soon as you try to floor it, the engine starts cutting out: http://www.youtube.com/watch?v=DfHrL3gNaJ0

The second is of the car cutting out and how it will not go much past 5k even with it floored. Notice that the speedometer is not rising very quickly: http://www.youtube.com/watch?v=9p67-hROA-k

I hope this helps in diagnosing the problem that I'm having.

*Deadman* · 08-16-2009, 06:37 AM

Could it be the box?

GettaRobo · 08-16-2009, 06:43 AM

Good suggestion, but I'm thinking if the engine won't even rev past 5200 RPM that it probably isn't it. I forgot to add that when you leave it floored for a bit you can begin to smell raw fuel when the windows are down.

*Deadman* · 08-16-2009, 08:09 AM

what about a leaky injecter or a crack in the manifold

Im just throwing out ideas see if anyone clicks

07-23-2009, 03:47 AM	#2
86.5supra 3" Exhaust Join Date: Jun 2009 Location: ny Posts: 83	mystery problem i had the same problem after i had my 7mgte rebuilt. the shop couldnt figure it out so they took the motor out tore it apart and put it back in the car. It turned out to be a bad throttle body and mass air. hope this helps

08-16-2009, 06:37 AM	#5
Deadman Stock Join Date: Jul 2009 Location: Christchurch Posts: 12	Could it be the box? __________________ "88 Turbo A 150xxx ks Stock (Wreaked) "86.5 widebody shell aero top factory manual Soon to come 86.5 with 7mgteu and r154 aerotop w/ leather seats

08-16-2009, 08:09 AM	#7
Deadman Stock Join Date: Jul 2009 Location: Christchurch Posts: 12	what about a leaky injecter or a crack in the manifold Im just throwing out ideas see if anyone clicks __________________ "88 Turbo A 150xxx ks Stock (Wreaked) "86.5 widebody shell aero top factory manual Soon to come 86.5 with 7mgteu and r154 aerotop w/ leather seats

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07-22-2009, 09:11 PM	#1
jcastro 3" Exhaust Join Date: Mar 2009 Location: El Centro Posts: 113	try doing a smog check and ask to check ur vacume lines if it dosent pass the smog ull at lest have a better idea of wut it is and im pretty sure thell tell u whats wrong

08-05-2009, 07:31 AM	#3
GettaRobo 3" Exhaust Join Date: Apr 2009 Location: Saskatoon, SK Posts: 65	Well, today I picked up my supra from the shop it's been at. The mechanic has officially given up on the car. He can only think that there may be a bad connection in the wiring system, but he's not sure. I also bought a speed sensor off of www.rockauto.com , but it does not fit in my car. So now I'm stuck with a broken car and a speed sensor that does not fit. Luckily I can return it. I've been having a hell of a time trying to find a speed sensor for that car. I basically want to replace it before I try anything else with the car since it's the 'easiest' to get at. The part number is 89411-30090 and upon further investigation, apparently a 30091 would work as well... If anyone knows where I might be able to obtain this part, it would be greatly appreciated. Aside from that, it looks like I may have to take a peak at the throttle body. P.S sorry for the long delay in updates... I was on holidays and was only able to steal a wireless highspeed connection a couple times

08-16-2009, 02:41 AM	#4
GettaRobo 3" Exhaust Join Date: Apr 2009 Location: Saskatoon, SK Posts: 65	For anyone interested, I have uploaded a couple videos on youtube. The first is of the car running fine up to 4000 RPM and then as soon as you try to floor it, the engine starts cutting out: http://www.youtube.com/watch?v=DfHrL3gNaJ0 The second is of the car cutting out and how it will not go much past 5k even with it floored. Notice that the speedometer is not rising very quickly: http://www.youtube.com/watch?v=9p67-hROA-k I hope this helps in diagnosing the problem that I'm having.

08-16-2009, 06:43 AM	#6
GettaRobo 3" Exhaust Join Date: Apr 2009 Location: Saskatoon, SK Posts: 65	Good suggestion, but I'm thinking if the engine won't even rev past 5200 RPM that it probably isn't it. I forgot to add that when you leave it floored for a bit you can begin to smell raw fuel when the windows are down.