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 04-15-2010, 11:27 PM   #1
Life is Supra
3" Exhaust
 
Join Date: Apr 2010
Location: Serbia
Posts: 51
Life is Supra is on a distinguished road
Default engine problems

I have a problem at cold start the rpms goes at 500 and than stals.When got to work temp.its fine and work ok at 800.Sometimes when I goes hard on the right foot,the car sut down when I let the aceleration pedal off?And I hear some knocking sound at head of the engine-can somebody tell me what to do I didnt check the codes...
Life is Supra is offline   Reply With Quote
Old 04-16-2010, 04:22 AM   #2
btwilson86
Super Moderator
 
btwilson86's Avatar
 
Join Date: May 2007
Location: Billings, Montana
Posts: 1,034
btwilson86 is on a distinguished road
Default

Quote:
Originally Posted by Life is Supra View Post
I didnt check the codes...
How about start by checking codes?

That's gonna give EVERYONE alot more useful info
__________________
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 04-18-2010, 02:07 PM   #3
Life is Supra
3" Exhaust
 
Join Date: Apr 2010
Location: Serbia
Posts: 51
Life is Supra is on a distinguished road
Default

I check the codes,and this is what I found-12,24,51.
Life is Supra is offline   Reply With Quote
Old 04-18-2010, 06:34 PM   #4
spoolmk3
Stock
 
spoolmk3's Avatar
 
Join Date: Apr 2010
Location: tacoma
Posts: 14
spoolmk3 is on a distinguished road
Default

12- rpm signal/ crank angle pulse/ cam angle sensor
24- intake air temp signal/ air flow meter
51- a.c. or neutral start switch--- is it a automatic?
__________________
motor swaps are a sad result of a non tuner!
If its a 7m / leave it a 7m
spoolmk3 is offline   Reply With Quote
Old 04-18-2010, 08:52 PM   #5
Life is Supra
3" Exhaust
 
Join Date: Apr 2010
Location: Serbia
Posts: 51
Life is Supra is on a distinguished road
Default

thanks for info,its manual and I dont want to swap it just interest if the crankshaft of 7mge fit to 7mgte engine?And the air flow meter what to do with it?
Life is Supra is offline   Reply With Quote
Old 04-18-2010, 08:58 PM   #6
spoolmk3
Stock
 
spoolmk3's Avatar
 
Join Date: Apr 2010
Location: tacoma
Posts: 14
spoolmk3 is on a distinguished road
Default

the cranks will swap over but there are 2 different ones a 6m and 7m. the 7m is the best its fully ballanced from the 89 to 92 you can tell the difference because the 7m has counter weights (hammers) on every shaft and the 6m is like every other and should have 6m stamped on it.. for the afm bench test it or try cleaning it the air temp sensor is the little probe in front of the v shaped meter when you look in side
__________________
motor swaps are a sad result of a non tuner!
If its a 7m / leave it a 7m

Last edited by spoolmk3; 04-18-2010 at 09:01 PM.
spoolmk3 is offline   Reply With Quote
Old 04-19-2010, 12:08 AM   #7
vbryanv
3" Exhaust
 
Join Date: Apr 2010
Location: new jersey
Posts: 57
vbryanv is on a distinguished road
Default

Quote:
Originally Posted by Life is Supra View Post
I have a problem at cold start the rpms goes at 500 and than stals.When got to work temp.its fine and work ok at 800.Sometimes when I goes hard on the right foot,the car sut down when I let the aceleration pedal off?And I hear some knocking sound at head of the engine-can somebody tell me what to do I didnt check the codes...
let me know what you find wrong. i have the same issue as you. hard to start, starts and stall. bogs around 1500rpm and past 1500rpm no problem. no start after hot. replace throttle position sensor plugs and there are no vacuum leaks or coolant leaks. any suggestions
vbryanv is offline   Reply With Quote
Old 04-19-2010, 01:54 AM   #8
Green7mgte
Supra Forum Moderator
 
Join Date: Nov 2009
Location: Green-Ohio
Posts: 1,297
Green7mgte is on a distinguished road
Default

Quote:
Originally Posted by spoolmk3 View Post
. for the afm bench test it or try cleaning it the air temp sensor is the little probe in front of the v shaped meter when you look in side
do not spray any sort of cleaner into your AFM.
__________________

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

Green7mgte is offline   Reply With Quote
Old 04-19-2010, 02:11 AM   #9
spoolmk3
Stock
 
spoolmk3's Avatar
 
Join Date: Apr 2010
Location: tacoma
Posts: 14
spoolmk3 is on a distinguished road
Default

my bad use a dry cloth..wipe away the buildup, as for the idle it might be time to have your injectors cleaned and balanced.
__________________
motor swaps are a sad result of a non tuner!
If its a 7m / leave it a 7m
spoolmk3 is offline   Reply With Quote
Old 06-13-2010, 10:25 AM   #10
Life is Supra
3" Exhaust
 
Join Date: Apr 2010
Location: Serbia
Posts: 51
Life is Supra is on a distinguished road
Default

As for the idle and cold start problem I replaced the spark plugs and now I dont have a problem with idle....
Life is Supra 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
engine problems darkOmini MKIII Supra 4 06-06-2010 03:34 PM
1982 supra-celica engine problems. plz help bjm007 MKII Supra 2 11-14-2009 09:30 PM
Sup Guys, total nub having some engine problems with my MKIII... Mr.Supra857 MKIII Supra 3 11-14-2006 06:37 PM
engine problems thewhitedevil69 MKIII Supra 3 03-07-2006 12:17 PM
Problems With New engine. lilsmitty MKIII Supra 1 10-29-2005 07:43 AM


All times are GMT. The time now is 11:10 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, 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 87