cold starting problems

Cjanik · 03-25-2007, 06:25 PM

Hey guys, first post here, i just purchased a 87 turbo supra.
the car runs better than my 2001 honda prelude SH did.

Im having a problem w/ starting. i'll have the engine turning over for ~5-8 seconds before it starts up.

ive looked through this site and have to say, wow, extreamly informational. however i wasnt able to find a solution to my problems. nothing seems to fit.

i ruled out spark plugs and injectors because my car idles and runs like a dream. i concluded if it were either of those two, then i'd feel the engine vibrate a little from misfires.

the other thing is, after having a hard time getting the car started, and when it warms up, i can shut off the car, wait 10-30 minutes, then start the car back up, and it starts on the very first click.

i consider myself mechanically inclined but when it comes to older cars and starting, im totaly clueless. Im asking here to see what i should be looking into, starting with the most likely solution to the least likely.

thanks in advance!

89killer · 03-25-2007, 07:30 PM

The csi time switch is likely your problem.Try replacing it and see if that helps.

Cjanik · 03-25-2007, 10:02 PM

Quote:

Originally Posted by 89killer

The csi time switch is likely your problem.Try replacing it and see if that helps.

after looking through my manual and searching online, im unable to find the location and purpose of the CSI time switch.

can you guide me here?

mrnickleye · 03-26-2007, 03:05 AM

Look in the FAQs section. see: "Cold Starting System Testing"

But of course, if '89killer' wants to GIVE you the switch, to TRY and fix it, well I suppose that MIGHT work.

schutz86 · 07-11-2008, 11:57 PM

i am having the same exact problem. i cant figure it out either. it seems like its loosing feul pressure after sitting for a few hours and its just cranking a little longer until it builds up the pressure and fires. cause once its running it runs great. i dont know anything about the CSI. if someone could tell me where it is so that i could see if its clogged at all that would help alot. thanks

ddmcse · 07-12-2008, 01:09 AM

you might want to investigate the "cold start" injector . when i pulled mine it was coated in black gunk. i replaced it and a few other things with a little but not total success and finally went on to real issues instead

schutz86 · 07-19-2008, 05:46 PM

could someone explain to me where the cold start injector is? i never herd of that. thanks

ddmcse · 07-27-2008, 12:25 PM

in the middle of the intake

see part #17129 bottom right of diagram
Manifold
it bolts into that from underneath right in the middle

close to the mounting bracket bolt you see

here is the cold start injector diagram
Fuel Injection System
#23260

mkiiisupra · 07-28-2008, 12:35 PM

It is summer, and from what i understand, depending on where your at your engine needs to be pretty cold for it to use the CSI...

" If the temp outside is more than about 65* (maybe 55*) it won't allow the injector to come on, to prevent flooding. Also, even in a snow storm, after 12 seconds of cranking time, the switch will stop supplying current to the injector. (prevent flooding)" (taken from the cold start injecotor post in FAQ section)

I thought this was my problem as well turned out to be timing and my throttle posistioning sensor.\

Run a diagnostic i you havent

schutz86 · 08-02-2008, 06:50 PM

ok so i found the CSI and i pulled it out. it was really dirty and cloged but i cleaned it up really well and im still having the problem. any other ideas?

03-26-2007, 03:05 AM	#4
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	Don't just throw parts ($$$) at it Look in the FAQs section. see: "Cold Starting System Testing" But of course, if '89killer' wants to GIVE you the switch, to TRY and fix it, well I suppose that MIGHT work. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

07-12-2008, 01:09 AM	#6
ddmcse 500whp yet? Join Date: Jun 2005 Location: CT U.S.A. Posts: 966	you might want to investigate the "cold start" injector . when i pulled mine it was coated in black gunk. i replaced it and a few other things with a little but not total success and finally went on to real issues instead __________________ 300+ RW HP Dyno run, jdm,mod turbo,3"exh,electfan,greddyboost Blown HeadGasket info My Supra KiXGaS

07-27-2008, 12:25 PM	#8
ddmcse 500whp yet? Join Date: Jun 2005 Location: CT U.S.A. Posts: 966	in the middle of the intake see part #17129 bottom right of diagram Manifold it bolts into that from underneath right in the middle close to the mounting bracket bolt you see here is the cold start injector diagram Fuel Injection System #23260 __________________ 300+ RW HP Dyno run, jdm,mod turbo,3"exh,electfan,greddyboost Blown HeadGasket info My Supra KiXGaS

07-28-2008, 12:35 PM	#9
mkiiisupra Lexus & 550's Join Date: Sep 2007 Location: Las Vegas, NV Posts: 570 Blog Entries: 1	It is summer, and from what i understand, depending on where your at your engine needs to be pretty cold for it to use the CSI... " If the temp outside is more than about 65* (maybe 55) it won't allow the injector to come on, to prevent flooding. Also, even in a snow storm, after 12 seconds of cranking time, the switch will stop supplying current to the injector. (prevent flooding)" (taken from the cold start injecotor post in FAQ section) I thought this was my problem as well turned out to be timing and my throttle posistioning sensor.\ Run a diagnostic i you havent __________________ 1990 Toyota Supra Turbo A/T ------------------------------------------------ Questions about oil? take a look http://www.supramania.com/aehaas/ Last edited by mkiiisupra; 07-28-2008 at 12:39 PM.*

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03-25-2007, 06:25 PM	#1
Cjanik Stock Join Date: Mar 2007 Location: vegas Posts: 3	cold starting problems Hey guys, first post here, i just purchased a 87 turbo supra. the car runs better than my 2001 honda prelude SH did. Im having a problem w/ starting. i'll have the engine turning over for ~5-8 seconds before it starts up. ive looked through this site and have to say, wow, extreamly informational. however i wasnt able to find a solution to my problems. nothing seems to fit. i ruled out spark plugs and injectors because my car idles and runs like a dream. i concluded if it were either of those two, then i'd feel the engine vibrate a little from misfires. the other thing is, after having a hard time getting the car started, and when it warms up, i can shut off the car, wait 10-30 minutes, then start the car back up, and it starts on the very first click. i consider myself mechanically inclined but when it comes to older cars and starting, im totaly clueless. Im asking here to see what i should be looking into, starting with the most likely solution to the least likely. thanks in advance!

03-25-2007, 07:30 PM	#2
89killer Stock Join Date: May 2006 Location: Norcal Posts: 1	The csi time switch is likely your problem.Try replacing it and see if that helps.

07-11-2008, 11:57 PM	#5
schutz86 Stock Join Date: Jul 2008 Location: Pittsburgh Posts: 7	i am having the same exact problem. i cant figure it out either. it seems like its loosing feul pressure after sitting for a few hours and its just cranking a little longer until it builds up the pressure and fires. cause once its running it runs great. i dont know anything about the CSI. if someone could tell me where it is so that i could see if its clogged at all that would help alot. thanks

07-19-2008, 05:46 PM	#7
schutz86 Stock Join Date: Jul 2008 Location: Pittsburgh Posts: 7	could someone explain to me where the cold start injector is? i never herd of that. thanks

08-02-2008, 06:50 PM	#10
schutz86 Stock Join Date: Jul 2008 Location: Pittsburgh Posts: 7	ok so i found the CSI and i pulled it out. it was really dirty and cloged but i cleaned it up really well and im still having the problem. any other ideas?