newbie chevy tpi setting. not idling good help.

jz2518 · Post by **jz2518** » Sat Sep 17, 2011 4:18 pm

i have a stock chevy 350 with a 24lbs injectors. and I using tach signal from a big hei. Only running fuel. It doesn't want to idle right. Also it have a small hesation when i press on the gas. Could any one check to see if i have the settings right on megasquirt.

Hahns5.2 · Post by **Hahns5.2** » Sat Sep 17, 2011 4:57 pm

Need more details. What kind of AFRs at idle? Hesitation is a result of poor AE tuning assuming your VE table is tuned well. I notice you're running a huge 200%/s TPSdot threshold which is a big part of that hesitation.

jz2518 · Post by **jz2518** » Sat Sep 17, 2011 6:00 pm

i updated the msq with the one that DIYAutoTune has on its website for a tbi. I just change it for 8 injector setup. Also a a did a datalog.

a73camaro · Post by **a73camaro** » Sun Sep 18, 2011 6:08 am

What Wide Band Air/Fuel Ratio device are you using?

jz2518 · Post by **jz2518** » Sun Sep 18, 2011 10:06 am

narrow band. Does any one have a msq file for a stock tpi.

kjones6039 · Post by **kjones6039** » Sun Sep 18, 2011 11:12 am

Hahns5.2 wrote:Need more details. What kind of AFRs at idle? Hesitation is a result of poor AE tuning assuming your VE table is tuned well. I notice you're running a huge 200%/s TPSdot threshold which is a big part of that hesitation.

I agree with Hahns. I have run the same setup before with good success. I have a couple msq's (1-fuel only and 1-with hei) that I will have to look for so that could take some time. In the mean time a log would be helpful.

Ken

Matt Cramer · Post by **Matt Cramer** » Mon Sep 19, 2011 4:59 am

Try a little less advance and a little more fuel. I'm pretty sure stock TPI motors did not idle at stoich very well.

kjones6039 · Post by **kjones6039** » Mon Sep 19, 2011 6:55 am

kjones6039 wrote:In the mean time a log would be helpful.

Don't know why the *&^$# I typed that......

I agree with Matt. My tpi certainly needed more fuel at idle.

Ken

WASyL · Post by **WASyL** » Tue Sep 20, 2011 5:59 am

from what i found:

you have 24's but config has 30's in injector control
dwell is 3.5, try range od 2-2,5

best regards

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newbie chevy tpi setting. not idling good help.

newbie chevy tpi setting. not idling good help.

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Re: newbie chevy tpi setting. not idling good help.

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Re: newbie chevy tpi setting. not idling good help.