Engine hesitation

[tcronogue]

I have a problem with my 87 G/N hesitating when first accelerating from a dead stop. Any ideas on possible cause?

 

[TurboSpeed]

Check you tps / iac valve,

 

[turbo nasty]

TPS and IAC could cause this as mentioned. What are the counts/volts at idle with engine at temp?

 

[tcronogue]

Thanks. Replaced TPS earlier. Wil try IAC valve. I'm not a mechanic. Anybody know a really good and honest turbo Buick mechanic in the Detroit area?

 

[TurboSpeed]

Do you have a scanmaster? or powerlogger?

 

[turbo nasty]

Thanks. Replaced TPS earlier. Wil try IAC valve. I'm not a mechanic. Anybody know a really good and honest turbo Buick mechanic in the Detroit area?

Do you even have a scantool?

The TPS has to be set at a certain voltage as well as the Minimum air blade setting on the throttle body for the IAC.

Homework time.....


Resources

 

[tcronogue]

Yes, I just installed a scanmaster but still need to learn how to use it. What should I be looking for to diagnose hesitation (almost stalling) problem when first accelerating? Runs great after it gets going. Did install a new IAC valve but it made no difference. How do I adjust IAC?

 

[Chuck Leeper]

Revisit..

Yes, I just installed a scanmaster but still need to learn how to use it. What should I be looking for to diagnose hesitation (almost stalling) problem when first accelerating? Runs great after it gets going. Did install a new IAC valve but it made no difference. How do I adjust IAC?

Post # 6, and go from there..

 

[Heath]

You still using stock MAF. I was having issues with a rebuilt one.

 

[tcronogue]

Still running original stock MAF. How do I know if it's bad? This old guy needs some help. I know carburetors and points. Not too smart on these cars but I'll try if I can get a little friendly patience and help.

 

[turbo nasty]

As stated before please do your homework on these cars. Take the time to read up and learn where the senors are, what they do and values they need to be set at.

Have you done a spring cleaning?

The Grand National / T-Type / Turbo Regal Buick Spring Cleaning Guide

Please take some time and review the info given. That way if someone says adjust this or that youll know where and what it is.