88 supra still with problems 7MGE

spunkenhimer · 02-15-2011, 04:54 AM

OK so here is the just. I blew a head gasket and replaced it. put it all back together and now the engine stays cool but i keep getting cool air out of the heating system in the car itself.

The car doesn't want to stay at a proper idle and when i try to rev it to about 2000rpm it starts to fluctuate from 1200rpm to 2000rpm over and over unless i give it more gas and get it to about 3000rpm and it'll stay there. If i let off the gass it'll drop below 1000rpm and eventually die.

Might have 2 seperate problems here but i don't know. the heating in the car worked before i did the gasket replacement and i swear i checked my lines 4 even 5 times before i went to hook it all up.

one last thing after i thought i had it finished i took it to a local gas station and got some gas but on the way back my throttle got stuck mid shift and went up too like 7000rpm and i had to turn the car off at that high of an rpm and stop and get out and fix it thats cause i didn't screw down the throttle linkage down all the way. that happened in between the car cutting off on its own.

Please help me i need my Berniece back she means so much to me.

spunkenhimer · 02-16-2011, 02:06 AM

Had someone send new this ( http://www.toyota-supra.info/forums/...e-problem.html ) but my car isnt getting hot on idle just sounding hard and cutting off. My car got hot cause I didn't clamp every thing down at first and one of the hoses poped off due to my throttle getting stuck. (something else I didn't tighten down all the way.)

ahruizguerra · 02-16-2011, 08:15 AM

Suggestions:

Check the MAF sensor connector. Sometimes it looks like it is hoop up right; but inside terminals might be dirty.
Check The TPS connector
Check the IDLE valve connector, do you hear any sound out of the idle valve as soon as you turn off your car????
Check that the fuel pressure regulator and fuel pump are working correctly.

Do you have the check engine light on????

spunkenhimer · 02-16-2011, 02:36 PM

no check engine light
thanks i'll check and see where those are.

spunkenhimer · 02-17-2011, 12:53 AM

ok now i go to crank it up and it wont get past 500rpm and when i try and gas it it wont throttle or rev up at all. could the fuel pump or fuel filter be a problem?

cre · 02-17-2011, 01:46 AM

Your car doesn't have a MAF... it has a VAFM and the GTE's have a KVAFM A huge difference between all three.

Check for diagnostic codes; Very few or the error codes will turn on the check engine light.

Fuel pump and filter are possibilities, but there are many others too. Start with checking the codes and post back.

http://www.cygnusx1.net/Supra/TechTi...ror_codes.aspx

Here'e the info on testing the VAFM (you may refer to it as an AFM if you like, both types used in the MKIII are AFM type devices).

http://www.cygnusx1.net/Supra/Librar...ection=FI&P=94

spunkenhimer · 02-19-2011, 04:09 AM

the check engine light doesn't come on at all would it come on when i turn the car on with the wires connected?
oh and the fuel pump isn't the problem fuel works fine. something with the vacuum lines or the timing...or god help me compression if its compression i'm just putting the damn car up for a few weeks getting me a honda and saving till i can buy a gte or a 2jz or something of the sort.

cre · 02-19-2011, 04:13 AM

The Check Engine light should ALWAYS come on when the key is turned to the ON position but not started; If it doesn't the bulb's burned out or there's a fault in the ECU.

If there are no diagnostic codes the Check Engine light will flash continuously at a high speed.

http://www.cygnusx1.net/Supra/TechTi...ror_codes.aspx

spunkenhimer · 02-19-2011, 04:17 AM

oh ok will get that done first thing in the morning was gonna do it today but didn't have enough time cause i had to work.

spunkenhimer · 02-19-2011, 11:05 PM

41 and 51 are the diagnostic codes my check engine light show to me. saying my throttle position sensor is the problem but i don't see how cause i checked that last night and it didn't seem to be the problem..idk. can anyone explain.

02-15-2011, 04:54 AM	#1
spunkenhimer Intake Join Date: Feb 2008 Location: Pikeville NC. Posts: 49	88 supra still with problems 7MGE OK so here is the just. I blew a head gasket and replaced it. put it all back together and now the engine stays cool but i keep getting cool air out of the heating system in the car itself. The car doesn't want to stay at a proper idle and when i try to rev it to about 2000rpm it starts to fluctuate from 1200rpm to 2000rpm over and over unless i give it more gas and get it to about 3000rpm and it'll stay there. If i let off the gass it'll drop below 1000rpm and eventually die. Might have 2 seperate problems here but i don't know. the heating in the car worked before i did the gasket replacement and i swear i checked my lines 4 even 5 times before i went to hook it all up. one last thing after i thought i had it finished i took it to a local gas station and got some gas but on the way back my throttle got stuck mid shift and went up too like 7000rpm and i had to turn the car off at that high of an rpm and stop and get out and fix it thats cause i didn't screw down the throttle linkage down all the way. that happened in between the car cutting off on its own. Please help me i need my Berniece back she means so much to me.

02-16-2011, 08:15 AM	#3
ahruizguerra Stock Join Date: Jul 2009 Location: san jose ca Posts: 22	Suggestions: Check the MAF sensor connector. Sometimes it looks like it is hoop up right; but inside terminals might be dirty. Check The TPS connector Check the IDLE valve connector, do you hear any sound out of the idle valve as soon as you turn off your car???? Check that the fuel pressure regulator and fuel pump are working correctly. Do you have the check engine light on????

02-17-2011, 01:46 AM	#6
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Your car doesn't have a MAF... it has a VAFM and the GTE's have a KVAFM A huge difference between all three. Check for diagnostic codes; Very few or the error codes will turn on the check engine light. Fuel pump and filter are possibilities, but there are many others too. Start with checking the codes and post back. http://www.cygnusx1.net/Supra/TechTi...ror_codes.aspx Here'e the info on testing the VAFM (you may refer to it as an AFM if you like, both types used in the MKIII are AFM type devices). http://www.cygnusx1.net/Supra/Librar...ection=FI&P=94 __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

02-19-2011, 04:09 AM	#7
spunkenhimer Intake Join Date: Feb 2008 Location: Pikeville NC. Posts: 49	the check engine light doesn't come on at all would it come on when i turn the car on with the wires connected? oh and the fuel pump isn't the problem fuel works fine. something with the vacuum lines or the timing...or god help me compression if its compression i'm just putting the damn car up for a few weeks getting me a honda and saving till i can buy a gte or a 2jz or something of the sort. Last edited by spunkenhimer; 02-19-2011 at 04:12 AM.

02-19-2011, 04:13 AM	#8
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	The Check Engine light should ALWAYS come on when the key is turned to the ON position but not started; If it doesn't the bulb's burned out or there's a fault in the ECU. If there are no diagnostic codes the Check Engine light will flash continuously at a high speed. http://www.cygnusx1.net/Supra/TechTi...ror_codes.aspx __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

02-16-2011, 02:06 AM	#2
spunkenhimer Intake Join Date: Feb 2008 Location: Pikeville NC. Posts: 49	Had someone send new this ( http://www.toyota-supra.info/forums/...e-problem.html ) but my car isnt getting hot on idle just sounding hard and cutting off. My car got hot cause I didn't clamp every thing down at first and one of the hoses poped off due to my throttle getting stuck. (something else I didn't tighten down all the way.)

02-16-2011, 02:36 PM	#4
spunkenhimer Intake Join Date: Feb 2008 Location: Pikeville NC. Posts: 49	no check engine light thanks i'll check and see where those are.

02-17-2011, 12:53 AM	#5
spunkenhimer Intake Join Date: Feb 2008 Location: Pikeville NC. Posts: 49	ok now i go to crank it up and it wont get past 500rpm and when i try and gas it it wont throttle or rev up at all. could the fuel pump or fuel filter be a problem?

02-19-2011, 04:17 AM	#9
spunkenhimer Intake Join Date: Feb 2008 Location: Pikeville NC. Posts: 49	oh ok will get that done first thing in the morning was gonna do it today but didn't have enough time cause i had to work.

02-19-2011, 11:05 PM	#10
spunkenhimer Intake Join Date: Feb 2008 Location: Pikeville NC. Posts: 49	41 and 51 are the diagnostic codes my check engine light show to me. saying my throttle position sensor is the problem but i don't see how cause i checked that last night and it didn't seem to be the problem..idk. can anyone explain. Last edited by spunkenhimer; 02-19-2011 at 11:09 PM.

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