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 11-28-2008, 10:09 PM   #1
dieseltech24179
3" Exhaust
 
Join Date: Oct 2008
Location: vinton
Posts: 57
dieseltech24179 is on a distinguished road
Default starts but then dont start

i just changed the spark plugs today and the car started up and then idled down and died it did this for awhile and finally it started and stayed running fine after i gave it a little fuel it ran fine for like 3 hours i drove it around to see if my overheating problem was fixed but anyways it started up fine after making a few stops here and there. then when i got back to my house i cut it off went in side for something and when i came back out it wouldnt start it would just crank and crank and crank. i bumped it over until the timing marks was inline with the knotchs on the cover and then i looked at the crank pulley and the mark down there said 7 or 8 degrees. could this be the reason for it not wanting to start everytime?
dieseltech24179 is offline   Reply With Quote
Old 11-29-2008, 07:12 AM   #2
CyFi6
3" Exhaust
 
Join Date: Oct 2007
Location: SLO
Posts: 234
CyFi6 is on a distinguished road
Default

it definitely can be, sounds like your belt slipped, you should definately fix it and also check out why it did that. When the cam marks are strait up, the crankshaft notch should be right at 0
CyFi6 is offline   Reply With Quote
Old 11-29-2008, 07:22 AM   #3
dieseltech24179
3" Exhaust
 
Join Date: Oct 2008
Location: vinton
Posts: 57
dieseltech24179 is on a distinguished road
Default timing

how would you set the timing then. this is the first vehicle i have ever owned that required timing so im a little confused about how to get that mark to line back up to zero
dieseltech24179 is offline   Reply With Quote
Old 11-29-2008, 08:00 AM   #4
CyFi6
3" Exhaust
 
Join Date: Oct 2007
Location: SLO
Posts: 234
CyFi6 is on a distinguished road
Default

You need to loosen the timing belt tensioner and slide the belt off the cams, then put the crank to the 0 mark, turn the cams so they are strait up and put the belt back on, and re-tension. Make sure you torque the tensioner bolt to the proper specs!! If you over tighten it you can cause the #1 cylinder to change shape and cause excessive blowby
CyFi6 is offline   Reply With Quote
Old 11-29-2008, 05:21 PM   #5
dieseltech24179
3" Exhaust
 
Join Date: Oct 2008
Location: vinton
Posts: 57
dieseltech24179 is on a distinguished road
Default Timing

Alright thanks for the help is this very hard to do? Just unbolt the tensioner I don't have to loosen the belt first or nething
dieseltech24179 is offline   Reply With Quote
Old 11-29-2008, 08:09 PM   #6
Chambers
walbro fp
 
Chambers's Avatar
 
Join Date: May 2007
Location: USA - Harford County, Maryland
Posts: 481
Chambers is on a distinguished road
Default

Don't unbolt the tensioner, just loosen it. Then you can use plyers to remove the spring that holds tension on the belt. After that just do as stated above, set all the marks to the correct place.

Good luck.
__________________
Whats in the garage, well.... in the yard.

1986.5 Toyota Supra - NA - 5 spd
1986 Ford Ranger Lowrider - 5 spd
1984 Ford Ranger XLT - 7" Lift - 4X4 - Auto
"Stuck in the 80's"
Chambers is offline   Reply With Quote
Old 11-29-2008, 08:10 PM   #7
dieseltech24179
3" Exhaust
 
Join Date: Oct 2008
Location: vinton
Posts: 57
dieseltech24179 is on a distinguished road
Default Timing

So whenever the mark on the crank gear is on zero the engine is at tdc so when I set the cam gear marks up then the engine is timed right. Seems like no way to mess it up.
dieseltech24179 is offline   Reply With Quote
Old 11-29-2008, 08:54 PM   #8
CyFi6
3" Exhaust
 
Join Date: Oct 2007
Location: SLO
Posts: 234
CyFi6 is on a distinguished road
Default

as long as the crank is at 0 when the cam marks are strait up, nothing is wrong with the valve timing. Do make sure that once you re-do it, you turn the crankshaft around a few times and make sure it still lines up. (note that the cam marks are only going to be strait up and down and at 0 with the crank every other revolution because they spin at half the speed)
CyFi6 is offline   Reply With Quote
Old 11-29-2008, 09:27 PM   #9
dieseltech24179
3" Exhaust
 
Join Date: Oct 2008
Location: vinton
Posts: 57
dieseltech24179 is on a distinguished road
Default Timing

Ok thanks I'm gonna try to do that tomorrow idk if it will start. The plugs may still be good. That would also explain the rush of air goin back into the intake when I crank like the intake valve opening when the piston is on the comp stroke???
dieseltech24179 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
87 Supra won't start RNEMESiS42 MKIII Supra 3 06-25-2011 06:30 PM
Car wont start hot carfanatic89 MKIII Supra 41 03-30-2009 10:58 PM
only starts by jump start ItsnotmySupra MKII Supra 6 04-27-2008 03:14 AM
My car decides when it wants to start carfanatic89 MKIII Supra 16 02-12-2008 07:50 PM
Car Died...where to start? Jrew MKIII Supra 4 10-26-2007 02:19 PM


All times are GMT. The time now is 10:16 PM.


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