v6-3.1

I have a 1990 camaro 3.1L V6. I only get 8 MPG. I did a tune up, no help . I want to adjust the ignition timing but I never did it, can someone tell me step by step how to do it?

Vader

V6,

If you did a "tune up" but didn't check the base timing, exactly what steps did you perform?

A "tune up" for an FI engine should include the following:

1. Cooling system inspection;
2. Clean or replace spark plugs;
3. Ignition wire testing;
4. Distributor cap/rotor (if you don't have the OptiSpark);
5. PCV valve cleaning or replacement;
6. Air filter;
7. Cleaning the IAC;
8. Checking/setting TPS voltage;
9. Check/adjust minimum air rate;
10. Check/adjust timing;
11. Code scan.

Maybe you should go back and clean up a few missed items, then report back with the remaining problems. I'll bet there aren't too many.

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Later,
Vader
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"What a Day..."
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v6-3.1

can you please tell me how to do these??

8. Checking/setting TPS voltage;
9. Check/adjust minimum air rate;
10. Check/adjust timing

v6-3.1

ttt

IROCketZ28

v6-3.1,
Check out the "Technical Articles" section of this site to get in depth lessons on your tuning questions!
** I'm not sure if the voltage specs are the same for the 6-shooter as they are for the V8s. Anybody know what voltage V6 TPSs should be set at?

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'87 IROC Z28
TPI 305
5-speed w/ Centerforce clutch
3 1/2" exhaust w/ Flowmaster
Clarion, Kenwood, Eclipse, Polk, MTX, Autotek 800 watt stereo system
Grant wheel
Otherwise stock, & good for a 14.68 at DeSoto Dragstrip
More to come soon...
Shooting for high 13's with bolt-on's

v6-3.1

where is the aldl? what is a aldl ?

Kevin Irving

Your ALDL (Assembly Line Diagnostic Link) is where you would either plug in a scanner or a paper clip to pull your trouble codes. It should be above your right knee when you sit in the driver's seat and might be covered with a little plastic piece. It is about 1" x3". You should really look through the tech articles section, it will explain how to pull the codes and what they mean.

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Kevin Irving
85 Trans Am WS-6, 305 TPI, custom burned '86 PROM with '87 "165"ECM, Accel Supercoil & 8.8 Wires, MSD 6AL, Aluminum Driveshaft, Wonderbar, TB Coolant Bypass, Ported Plenum, Modified MAF, Syclone Fuel Pump, JET Airfoil

15.556 @ 86.65mph, Nov 10, 2000.... I know it sucks.. but it will get better!

http://www.geocities.com/transam85tpi/

Member - The Tidewater Trans Am Club, Norfolk VA http://www.geocities.com/ttacva/

[This message has been edited by Kevin Irving (edited April 11, 2001).]

v6-3.1

thank you very much, now I know what that is, I pulled the codes before butI did not know what the name of it was. thank you for your time!!

v6-3.1

The tech article did not give an informative tutorial about the TPS.for the TPS(Throttle Positioning Switch) , can I use a regular voltometer (needle type), can someone give me more info? also is the IAC the same as the minimum air rate?

v6-3.1

I also read that the 90-92 TPS are self adjustable and do not need to be tampered with, is this true??

v6-3.1

to the top>>

v6-3.1

btt

Kevin Irving

Yes, the 90-92 TPS is not adjustable, it uses the voltage given when the throttle is closed as the base unless it is over 1.0v. I guess the tech article on how to adjust the TPS wouldn't apply to you then.....