Welcome to Camaro Z28!

Welcome to CamaroZ28.Com, the ultimate Source for Camaro enthusiasts! Here you can join over 90,000 Camaro enthusiasts from around the world discussing all things related to Camaros and more. You are currently viewing as a guest which gives you limited access to view discussions

To gain full access to our forums you must register for a free account. As a registered member you will be able to:
  • Participate in over 40 different forums and search/browse from over 5 million posts.
  • Upload your Camaro details to your Garage
  • Post photos, respond to polls and access other special features
  • Gain access to our free marketplace to buy, sell and trade Camaros, parts and more.
All this and much more is available to you absolutely free when you register for an account, so join our community today today!

If you have any problems with the registration process or your account login, please contact support.


Go Back   CamaroZ28.Com Message Board > 1967-2002 Powertrain Discussion > 3rd Gen / L98 Engine Tech
Sign in using an external account
Register Forgot Password?
Register Garage Photos Blogs FAQ Members List Social Groups Links Calendar Search Today's Posts Mark Forums Read Z28LiveVendor Directory


Reply Post New Thread
 
 
LinkBack Thread Tools Search this Thread Display Modes
Old 01-02-2009, 09:35 AM   #1
Registered User
 
Join Date: Feb 2003
Location: Virginia
Posts: 1,602
89 IROC L98 wont start cold

Car is an all stock 1989 IROC-Z that my dad has, its been sitting awhile and we just got it running so he can try to sell it. We put a new fuel pump in it and now it runs....needs starting fluid for the first cold start but after its been running and you cut it off it will start on its own.

I havent messed with any third gens in a few years since I sold my 87 so im getting a little rusty....anyone have any ideas on what to check?

He did install a new temp. sender (not for the gauge) in the car and that didnt help it....dealer mechanic said that could do it but didnt help.

Thanks guys, and Happy New Year !
This ad is not displayed to registered members.
Register your free account today and become a member on CamaroZ28.com!
__________________
2000 Camaro SS A4 # 3535,milled LS6 heads (to 62cc's) with Cometic .045,custom 230/236 .591/.600-112 cam,Hooker LT's with TSP catted Y,LS6 intake,3400 Vig. stall

'86 IROC-Z clone race car, 565/TH400 5.68@120 off early and on the brakes
Rice Killer87 is offline   Reply With Quote
Old 01-02-2009, 05:52 PM   #2
Registered User
 
DAKMOR's Avatar
 
Join Date: Dec 2006
Location: Philaduhphia
Posts: 1,407
Garage
did you make sure there was fuel to burn?
__________________
DAKMOR is offline   Reply With Quote
Old 01-02-2009, 10:03 PM   #3
Registered User
 
Join Date: Sep 1999
Posts: 566
I had the opposite problem. Would start cold but not after it warmed up. Turns out it was my injectors. Ohm check them when they're hot. Should be 16-17 ohms each. (Mine were everywhere from 9-16 ohms, about half were bad. I replaced them all).

The stock injectors seem to be failing quite frequently in the 3rd gens. Just getting to be that time.

If it won't start without starter fluid when it's cold, it would seem that you have either a weak psi on the regulator (does it lose pressure fast after you shut the car off?), or weak injector pulses. But I'd check the injectors first. When those don't work, you'll get all sorts of problems.

Last edited by Gord's Green Z28; 01-02-2009 at 10:05 PM.
Gord's Green Z28 is offline   Reply With Quote
Old 01-03-2009, 01:45 AM   #4
Registered User
 
Join Date: Mar 2002
Location: Byhalia Ms, just south of Memphis
Posts: 380
wish i could find that thread where on a vette forum the fella ran the injectors and shown how they do cold and what happens when they get up to temp. he repeted the process after putting them in he freezer to cool them off and once again when they got up to temp some would hit and miss, others had less flow and so on, these were the stock injectors.
if yours are the stockers then its porobably time you changed them.

see what Rih can do for ya. when he ask you have 22 lbs if your car is a 350 or 19 lbs if its a 305. Rich is good people, he did mine and did a fine job.
__________________
Richard
89 formula LB9 WS6 T-5
83 T/A 350 T-5
run it wide open till ya see god "THEN" brake !
quickchicken is offline   Reply With Quote
Old 01-05-2009, 04:57 PM   #5
Registered User
 
Join Date: Feb 2003
Location: Virginia
Posts: 1,602
Thanks for the info guys.

Havent gotten to work on it as we've been working (fortunately) until dark and its outside but will ohm the injectors in the next day or two...was hoping it wasnt them. Thanks Gord for giving me what the ohm's should be.
__________________
2000 Camaro SS A4 # 3535,milled LS6 heads (to 62cc's) with Cometic .045,custom 230/236 .591/.600-112 cam,Hooker LT's with TSP catted Y,LS6 intake,3400 Vig. stall

'86 IROC-Z clone race car, 565/TH400 5.68@120 off early and on the brakes
Rice Killer87 is offline   Reply With Quote
Old 01-11-2009, 05:35 PM   #6
Registered User
 
Join Date: Sep 2008
Location: NY
Posts: 88
hmm I would look into the cold start injector. Its the 9th injector in the back on the driver side.
86camaro383 is offline   Reply With Quote
Old 01-11-2009, 11:31 PM   #7
Registered User
 
Join Date: Mar 2002
Location: Byhalia Ms, just south of Memphis
Posts: 380
89 dosent have the 9th injector, 88 was the last year for that.
i agree with Gord, check the injectors first thing and check the timing as that can make a diff if its retarded or way advanced. the sticker on your hood will tell you what base should be.
__________________
Richard
89 formula LB9 WS6 T-5
83 T/A 350 T-5
run it wide open till ya see god "THEN" brake !

Last edited by quickchicken; 01-11-2009 at 11:34 PM.
quickchicken is offline   Reply With Quote
Old 01-13-2009, 01:00 AM   #8
Registered User
 
Join Date: May 2007
Location: Fort Atkinson, WI
Posts: 329
I'm the secons owner of an 89 iroc-z 350 and there is a ninth injector and I've had it replaced for the same problem. Will not start cold. 1989 was the 1 and only year that had a ninth injector. 85-88 did not have them, and there was so many problems with them that in 1990 they did not use them. Oh and to the people who want to disagree I have a 1988 firebird formula that is all stock with a 350 and there is not a ninth injector.
cars3 is offline   Reply With Quote
Old 01-13-2009, 09:11 AM   #9
Registered User
 
Join Date: Mar 2002
Location: Byhalia Ms, just south of Memphis
Posts: 380
89 does not have the 9th injector. my 89 formula dosent have one and they ran from 85-88 on the 9th injector, this is one of the reasons i avoid any TPI from 85-88. 85 esp since it has a weird MAF situation that they changed in
86, go price the MAF and you will see what i mean. my friend learned the hard way when he dropped his.
everysingle pre 89 car iv had my hands on had the 9th injector and vice versa for the 89+ cars. if you have a 88 and older car you better check the VIN if it dosent have a 9th injector as its ither a mis read vin or someone pulled the supply hose, cappped it off and changed the bin file to a 89 which is TOTALLY possible.
__________________
Richard
89 formula LB9 WS6 T-5
83 T/A 350 T-5
run it wide open till ya see god "THEN" brake !
quickchicken is offline   Reply With Quote
Old 01-31-2009, 03:56 AM   #10
Registered User
 
Join Date: May 2003
Posts: 158
cold start

Quote:
Originally Posted by quickchicken View Post
... if you have a 88 and older car you better check the VIN if it dosn't have a 9th injector as its either a miss read VIN or someone pulled the supply hose, capped it off and changed the bin file to a 89 which is TOTALLY possible.
Guilty

My '88 had the cold start injector. I switched to an '89 bin and deleted the injector, fuel supply line, and plugged the fuel rail & injector port in the runner flange. i didn't delete the cold start temp-timing sensor thought I could use that for something else some day.

Also guilty of:

Deleting the TB coolant, yes deleting vs bypassing.
__________________
88' IROCZ 388/6.4L TPI Motown 350/4-bolt main stroker....and then some.
raul.garcia is offline   Reply With Quote
Old 01-31-2009, 11:30 AM   #11
Registered User
 
Join Date: Mar 2002
Location: Byhalia Ms, just south of Memphis
Posts: 380
Raul thats pobably the best thing you could have done for your system. a friend of mine out west had a car in his shop and called me to see if i knew anyone that had a replacement injector because the one in the car he was working on went south.
thats exactly what i would do if i got a pre 89 car.
__________________
Richard
89 formula LB9 WS6 T-5
83 T/A 350 T-5
run it wide open till ya see god "THEN" brake !
quickchicken is offline   Reply With Quote
Old 01-31-2009, 11:30 AM
 
Reply Post New Thread

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 08:50 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO ©2011, Crawlability, Inc.
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
Copyright © 1996-2013 CamaroZ28.Com. All rights reserved.