IAT sensor
#1
I'm Miserable!
Thread Starter
Join Date: Sep 2007
Location: Marysville, California
Posts: 203
Total Cats: 0
IAT sensor
my car was idling werid going up and down but when i take out the iat sensor it idles fine again. did i do something wrong with the installation? or do i have to go adjust something in the ecu? please help!
#4
you know whats wierd, even when using the GM default values my intake temp readings were still about 10 degrees off. It was reading too low, but my car idled really really good. So instead of using the 2490 ohms i used something like 1800 ohms for the bias resistor. Now that it reads the correct temp, it idles like crap just like yours, up and down. When it was reading too low, I guess it was running a tad bit more rich.
Time to mess with my VE tables.
Time to mess with my VE tables.
#5
you know whats wierd, even when using the GM default values my intake temp readings were still about 10 degrees off. It was reading too low, but my car idled really really good. So instead of using the 2490 ohms i used something like 1800 ohms for the bias resistor. Now that it reads the correct temp, it idles like crap just like yours, up and down. When it was reading too low, I guess it was running a tad bit more rich.
Time to mess with my VE tables.
Time to mess with my VE tables.
#6
you know whats wierd, even when using the GM default values my intake temp readings were still about 10 degrees off. It was reading too low, but my car idled really really good. So instead of using the 2490 ohms i used something like 1800 ohms for the bias resistor. Now that it reads the correct temp, it idles like crap just like yours, up and down. When it was reading too low, I guess it was running a tad bit more rich.
Time to mess with my VE tables.
Time to mess with my VE tables.
#12
Have you tried your AIC? If it thinks there is a cold start condition it will offer abit of choke but if it is not setup properly it could give to much air to quickly. It makes a huge dif in idle quality with these cars. Before i got mine right i was ideling in the 12 or so range when cold to run.
#13
Elite Member
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Join Date: Jun 2006
Location: Warrington/Birmingham
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cos you've got huge injectors. I've the same issue.
with a .1 change in PW you get a bigger AFR swing, you need it richer to stop it going too lean with each point change in pulewidth.
I found the Highres allowed me to run leaner at idle and it idled far smoother. shame it caused constant missfires :(
with a .1 change in PW you get a bigger AFR swing, you need it richer to stop it going too lean with each point change in pulewidth.
I found the Highres allowed me to run leaner at idle and it idled far smoother. shame it caused constant missfires :(
#17
Boost Czar
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Join Date: May 2005
Location: Chantilly, VA
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it shoudl be pretty damn smooth,,,,,,, even with a blown head gasket: http://www.youtube.com/watch?v=HxCO3EVoQtI
#18
I'm Miserable!
Thread Starter
Join Date: Sep 2007
Location: Marysville, California
Posts: 203
Total Cats: 0
okay, i'm running 550cc rx7 injectors. today i found out my manifold is CRACKED!!!!!!!!! hehehe...i knew it was comming..what manifold can i get for this 16g turbo? i still can't fix my idle...i messed with vetables and got it to idle a little better but **** it back fires like a lot just randomly!
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