No Computer Info - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old Dec 26th, 01, 12:54 PM Thread Starter
 
Join Date: Dec 2001
Location: Hazard, Ky. USA
Posts: 3
Unhappy

I have a 1986 Iroc, with 305 tune port fuel injection. The problem is an engine surge whenever I release the throttle and also at idle. If I don't push throttle down at stop sign and hold brake also, the engine dies.
Local mechanic tried to run codes but the computer wont give a read out.
I would really appreciate some help.
Bill
My Iroc is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old Dec 26th, 01, 01:36 PM
Senior Tech
 
Join Date: Feb 2000
Location: Waldorf,Md,USA
Posts: 176
Post

Does the "Check Engine" or "Service Engine Soon" light work, if not check to see if the bulb is burnt out, the computer will not function without it.

------------------
Leo Paugh
MCC #017
www.clark.net/pub/chevelle/mcc.htm
If you have no fear, you're not going as fast as you could.
chev64 is offline  
post #3 of 8 (permalink) Old Dec 26th, 01, 03:36 PM
 
Join Date: Dec 2001
Location: Crossville,TN.,US
Posts: 11
Cool

Light is probably out or something.Sounds like the throttle position switch.Easy fix or check. Three wires coming off of it one is constant 5volt feed two is ground three is feed for ECM should be .525 volts at idle and increase to right at 5 volt as you open the throttle have to use jumper wires between connection and TPS its adjusted by loosening the 2 screws and turning TPS to .525 at idle about $30 at store.Check does require digital volt meter.
Randy Davidson is offline  
 
post #4 of 8 (permalink) Old Dec 26th, 01, 05:12 PM Thread Starter
 
Join Date: Dec 2001
Location: Hazard, Ky. USA
Posts: 3
Post

Yes, the light does work. It usually comes on when the car acts up.

<BLOCKQUOTE>quote:</font><HR>Originally posted by chev64:
Does the "Check Engine" or "Service Engine Soon" light work, if not check to see if the bulb is burnt out, the computer will not function without it.

<HR></BLOCKQUOTE>

My Iroc is offline  
post #5 of 8 (permalink) Old Dec 26th, 01, 05:18 PM Thread Starter
 
Join Date: Dec 2001
Location: Hazard, Ky. USA
Posts: 3
Post

<BLOCKQUOTE>quote:</font><HR>Originally posted by My Iroc:
Yes, the light does work. It usually comes on when the car acts up.

<HR></BLOCKQUOTE>
Check engine light seems to be OK. When I cross the terminals under the dash for a code, all it ever shows is the code for MAF sensor, which I have changed twice from different auto parts stores.
When a tester is inserted into the slot under the dash no data is sent to the tester.

My Iroc is offline  
post #6 of 8 (permalink) Old Dec 26th, 01, 07:14 PM
Senior Tech
 
Join Date: Oct 2001
Location: milw,wi,usa
Posts: 159
Post

Try this out.Remove ducting from throttle body so you can see throttle plate.Open throttle by hand and see if there is a bunch of hard black carbon called "coking" all built up in there.It's blocking the air from getting into the engine with throttle closed.Idle air control passage might have that in there as well.Get some carb spray and a firm toothbrush and get that throttle body cleaned up.I have personally seen this a few times on port fuel injected engines and after getting all that coking cleaned out the engines ran mint.Try it out.Also not to rip on anyone's answers but the computer "will" work just fine without the check engine light.Gm would not have their computer 'shutdown' because of a bulb burning out!

[This message has been edited by sschevyfan (edited 12-26-2001).]
sschevyfan is offline  
post #7 of 8 (permalink) Old Dec 26th, 01, 08:07 PM
 
Join Date: Mar 2001
Location: Salem,Or,USA
Posts: 12
Thumbs up

Any help would be helpfull. I spent the summer swaping a 305 tpi for a 350 tweaked to a 420+ hp 366. ever since the computer has been tweaked. I've been gettin a hard code 34 ever since. check all sensers i think and swaped mass, ecm(not chip), and relays. everything seems ok except the code, a really rich fuel mixture smell, and the same surge when its cold out. any thoughts i'm starting think about looking in to an aftermarket fuel manegment system ,but if i can find one its going to $$$$$$$.

help.

------------------
1987 Electric Yellow IROC-Z
350 TPI Tweaked to 420+ hp 366
700R4 with TCI 2500 stall
Richmand 3:73 posi
Just T-Z-N is offline  
post #8 of 8 (permalink) Old Dec 27th, 01, 10:43 PM
Tech Team
 
Join Date: Nov 2001
Location: Marshfield, WI,usa
Posts: 92
Post

Just a thought. If it's an automatic you might try checking the lock up tourqe converter switch. This is a common problem on new cav's and sunfires as well as several fords. Just a thought
also, It won't show any codes for this problem

[This message has been edited by blown67ss (edited 12-28-2001).]
blown67ss is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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

 
For the best viewing experience please update your browser to Google Chrome