Home / Toyota Supra Forums

Go Back   Toyota Supra Forums! Join the Supra forum! > Performance, Modification, and Maintenance Forums - for generation specific discussions > MKIII Supra

Reply
 
Thread Tools Display Modes
Old 05-07-2012, 06:06 AM   #1
Dues Ex Machina
Stock
 
Join Date: May 2012
Location: Mesa, AZ
Posts: 10
Dues Ex Machina is on a distinguished road
Default several issues weird stalling

most of this stuff has probably been discussed somewhere before but im new to this forum and would appreciate it if you guys would point me in the right direction.

i have an 88 supra non turbo, ive had it for about 2 months or so maybe more. ever since i got it, it has a stalling problem. at first not very often. then started getting worse and would stall at every light. i took it to a mechanic and they couldnt figure it out, he said he rewired the idle control sensor but thats about it. it improved slightly but still wld stall. i then took it to another guy who claims to know older engines and he said he tweaked it a bit. said the timing was way way advanced, the cold start injector wasnt connected and lowered idle a bit. it ran way better, still the occasional stall never the less. anyway now for some reason my car on the way home flicked a couple lights on the dash and died as i stopped in my driveway. i thought it was weird so i tried to turn it on again and it cranked really slow and didnt start. tried again and it cranked really slow again then made the famous battery dead clicking noise. i tried again and it still cranked slow but managed to turn on but now it doesnt seem to want to stay running unless i give it gas. voltometer on dash reads lower on acc. and slightly lower when running. i bought a new battery at autozone because they said it was no good and now a battery later still the same. any ideas?

sorry for the long post just thought u guys needed to know the details.


Also, I tried the alternator test where I pull the pos lead from battery while car is running and it stayed running...

Last edited by Dues Ex Machina; 05-07-2012 at 06:50 AM.
Dues Ex Machina is offline   Reply With Quote
Old 05-07-2012, 06:04 PM   #2
Dues Ex Machina
Stock
 
Join Date: May 2012
Location: Mesa, AZ
Posts: 10
Dues Ex Machina is on a distinguished road
Default

Anyone? Any help is appreciated
Dues Ex Machina is offline   Reply With Quote
Old 05-07-2012, 08:11 PM   #3
btwilson86
Super Moderator
 
btwilson86's Avatar
 
Join Date: May 2007
Location: Billings, Montana
Posts: 1,034
btwilson86 is on a distinguished road
Default

I had a 87 N/A auto that used to stall out at lights, turned out to be a combination of vacuum leaks, vacuum lines routed improperly, and a TPS out of adjustment. I'd check those 3, in that order. I'd also get that alternator load tested, because that sounds like it could be part of your dying problem. Also make sure your battery connections are tight and corrosion free
__________________
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
btwilson86 is offline   Reply With Quote
Old 05-07-2012, 09:50 PM   #4
Dues Ex Machina
Stock
 
Join Date: May 2012
Location: Mesa, AZ
Posts: 10
Dues Ex Machina is on a distinguished road
Smile

Quote:
Originally Posted by btwilson86 View Post
I had a 87 N/A auto that used to stall out at lights, turned out to be a combination of vacuum leaks, vacuum lines routed improperly, and a TPS out of adjustment. I'd check those 3, in that order. I'd also get that alternator load tested, because that sounds like it could be part of your dying problem. Also make sure your battery connections are tight and corrosion free
I see yeah I thought vacuum lines might be off but the sticker under good for diagram was unreadable and I'm.having a hard time locating all of the lines using the tsrm... also, I think the vsv is missing it was in the glove box does that impact performance? How would a noob like me go about setting the tps right? Thanks for the help
as for the alternator, the test I did doesn't prove that its functioning right? How would o test it for sure?
Dues Ex Machina is offline   Reply With Quote
Old 05-08-2012, 02:14 AM   #5
btwilson86
Super Moderator
 
btwilson86's Avatar
 
Join Date: May 2007
Location: Billings, Montana
Posts: 1,034
btwilson86 is on a distinguished road
Default

Well, the test you did with the alternator does prove that it works enough to let the car idle. But a load test will make sure it's providing the amount of power it's designed to output. There's a link in the TSRM that tells you how to check and calibrate the tps using an ohmmeter and feeler gauges. Should be in the efi system/throttle body section.

The TSRM will cover nearly all of the emissions system vacuum lines. Missing a vsv will likely cause performance issues, you should find out which one it is and reinstall it
__________________
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
btwilson86 is offline   Reply With Quote
Old 05-08-2012, 03:32 PM   #6
Dues Ex Machina
Stock
 
Join Date: May 2012
Location: Mesa, AZ
Posts: 10
Dues Ex Machina is on a distinguished road
Default

Alright so, we were tweaking with the car it seems like the voltometer on the car is now where it should be and it cranks like normal now. We tightened the little bar connecting the throttle to the engine. Idk what its called its a little bar. It was loose giving some play and slightly raised idle. But its weird. We got it to idle at 800rpm however sometimes when accelerating then letting off gas it'll drop to 600 or so rpm. Now every once and a while it'll manage to die. Sometimes though if the ac is on it'll idle at around 1000 rpm that may be normal but it seems a little high. It'll go down to 750ish as well after letting off gas. I guess ill make sure vacuum lines are good and find out about the vsv after that ill check the alternator and the tps
Dues Ex Machina is offline   Reply With Quote
Old 05-08-2012, 05:00 PM   #7
Green7mgte
Supra Forum Moderator
 
Join Date: Nov 2009
Location: Green-Ohio
Posts: 1,297
Green7mgte is on a distinguished road
Default

did you see what codes are stored? did you check the tsrm trouble shooting flow chart?

http://www.cygnusx1.net/Supra/Librar...aspx?S=FI&P=14
__________________

92 Ma71 7mGTE Auto. SafcII
Supra FAQ
Supra MKIII FAQ
Classified Section guidelines :

Green7mgte is offline   Reply With Quote
Old 05-08-2012, 06:11 PM   #8
Dues Ex Machina
Stock
 
Join Date: May 2012
Location: Mesa, AZ
Posts: 10
Dues Ex Machina is on a distinguished road
Default

Quote:
Originally Posted by Green7mgte View Post
did you see what codes are stored? did you check the tsrm trouble shooting flow chart?

http://www.cygnusx1.net/Supra/Librar...aspx?S=FI&P=14

I haven't checked the codes yet. check engine light isn't on so I didn't think about checking them. will check them anyways soon and see if it throws any. yeah I checked it. the symptoms that I had it said to check vacuum lines. as far as I can tell vacuum lines are fine except for vsv missing. the one on drivers side on the bottom side of engine.

also, since we changed battery and tweaked idle and tightened that bar going to the throttle, it feels like it runs stronger. it used to feel sluggish
Dues Ex Machina is offline   Reply With Quote
Old 05-09-2012, 04:18 AM   #9
Green7mgte
Supra Forum Moderator
 
Join Date: Nov 2009
Location: Green-Ohio
Posts: 1,297
Green7mgte is on a distinguished road
Default

the light doesn't necessarily stay on.. give it a check man.
__________________

92 Ma71 7mGTE Auto. SafcII
Supra FAQ
Supra MKIII FAQ
Classified Section guidelines :

Green7mgte is offline   Reply With Quote
Old 06-04-2012, 11:59 PM   #10
Dues Ex Machina
Stock
 
Join Date: May 2012
Location: Mesa, AZ
Posts: 10
Dues Ex Machina is on a distinguished road
Default

fixed, turned out that the alternator was dead and i had air intake leaks fixed that and runs good now doesnt stall
only thing is that itll idle funny, like when i stop itll idle at around 700 and then slowly climb to around 900 where it stays. then i give it gas and again itll go back to 700ish and climb slowly to 900
not a big deal just something i noticed
Dues Ex Machina is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Cold start issues??? Stanghunter MKIII Supra 1 07-19-2010 09:48 PM
89 toyota supra non-turbo having issues Richie MKIII Supra 9 04-17-2010 03:11 AM
Transmission issues? Can anyone help? Kevin V MKIII Supra 3 03-19-2010 08:03 AM
Few issues before buy morbid1 Non-Generation Specific Questions 1 07-13-2009 08:20 PM
Wiring issues sstvns Non-Generation Specific Questions 1 10-05-2005 08:49 AM


All times are GMT. The time now is 08:23 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

1986



1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86