Mon Jul 08, 2013 3:56 pm by Admin

For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

Comments: 0

Latest topics
» Which turbo trans for my swap application?
Today at 11:24 am by sharkey

» Poly based strut mounts on exchange
Fri Aug 18, 2017 10:16 pm by xschop

» 18x10" Enkei wheels
Wed Aug 16, 2017 9:59 pm by Sterling Doc

» Around the block
Tue Aug 15, 2017 11:46 am by Red944ls1

» RX7 Caliper Swap
Mon Aug 14, 2017 8:13 am by osx86ftw

» Cooling solutions please!
Sun Aug 13, 2017 3:15 pm by yamamtx

» Holley intake, vacuum pump and cross member spacer
Sun Aug 13, 2017 12:33 am by zeusrotty

» Sparkydog's Abnormal Build - 944 With L67 + Ford Stuff & CARB Legal
Sat Aug 12, 2017 3:42 pm by sparkydog

» LSA Supercharged 86 Porsche 944
Sat Aug 12, 2017 7:41 am by haroldk

» Coolant / header tank cap
Wed Aug 09, 2017 7:56 pm by Arthropraxis

August 2017

Calendar Calendar

Log in

I forgot my password

Cold Start Manners

View previous topic View next topic Go down

Cold Start Manners

Post  Rich L. on Thu May 17, 2012 3:23 pm

Howdy. My LS1 does not like to idle when cold. On first start of the day I have to sit there and baby sit the throttle for the first minute or 2 or it'll die. Once it gets warmed up it idles at a rock steady 850 and has very good throttle response. So it seems to me to just be a problem in that "open loop" period on cold startup.

This seems to be a common problem as I see many threads on the various forums complaining of similar bahavior. There are suggestion to do a "TPS reset" and a "IAC relearn" but procedures vary. Does anyone have the true steps to perform these? I also see suggestions to clean the IAC and clean the MAF wire. Both of these parts I got used so I should try cleaning them. Has such cleaning helped any of y'all?

But the real culprit is probably the tune. My engine has fairly big cam and I read that it takes a lot of tuning time/data to get nice cold idle manners. I suppose it's likely the shop that rebuild and dyno-tuned my engine didn't really put the effort in for this. It's not the end of the world as once I get a couple minutes of running the engine is all good. Perhaps I should just be happy with that.

Any other suggestions for things to try short of getting it re-tuned?

Rich L.

Posts : 810
Join date : 2011-05-30
Location : Seattle

Back to top Go down

Re: Cold Start Manners

Post  948inVA on Thu May 17, 2012 5:03 pm

Have you checked the coolant temp sensor on the driver's side head? Usually when it fails the PCM thinks the engine is warm.

Posts : 222
Join date : 2012-01-01
Location : n. virginia

Back to top Go down

Re: Cold Start Manners

Post  Rich L. on Thu May 17, 2012 6:42 pm

Ah, good thought. But when I connect the scan tool the PCM's water temp starts at ambient and climbs with the dash gauge. So I think it's reading correctly.

Rich L.

Posts : 810
Join date : 2011-05-30
Location : Seattle

Back to top Go down

View previous topic View next topic Back to top

- Similar topics

Permissions in this forum:
You cannot reply to topics in this forum