IAT and mileage - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 01-06-2010, 12:19 AM   #11
Senior Member
Posts like a Turbo
 
LeSabreUltra's Avatar
 
Join Date: Feb 2007
Location: Alabama
Posts: 494
Thanks: 0
Thanked 0 Times in 0 Posts
LeSabreUltra is on a distinguished road
Default

Really, you probably want to start with getting the proper tune for your engine and going from there. Your stock PCM can't run that engine properly!

Once you do that, helping you fine tune that engine to get it exactly where it'* supposed to be is going to be a lot easier.

Did you keep your stock trans with the engine swap or put in one that came with the engine? What year and model car did the L67 come from?
.
.
.
LeSabreUltra is offline   Reply With Quote
Old 01-06-2010, 12:30 AM   #12
Junior Member
Posts like a V-Tak
Thread Starter
 
Join Date: Dec 2008
Posts: 28
Thanks: 0
Thanked 0 Times in 0 Posts
nightshade is on a distinguished road
Default

the trans is stock but im thinking about replacing it soon but i dont which one to go with yet and from what i know the motor came out of 1999 grand prix gtp bolted right but every plugged matched expect the map and of course there was non for the bbp but i cant complain the car has a **** load of power just really crappy gas mileage
nightshade is offline   Reply With Quote
Old 01-06-2010, 12:53 AM   #13
Senior Member
Posts like a Turbo
 
LeSabreUltra's Avatar
 
Join Date: Feb 2007
Location: Alabama
Posts: 494
Thanks: 0
Thanked 0 Times in 0 Posts
LeSabreUltra is on a distinguished road
Default

Easiest thing to do would be this:

Get yourself a 1996 SSEi engine harness...or modify yours for the additional wires needed for the supercharger...not hard to do, just find someone with wiring diagrams...it'* really not hard at all.

I'm not really familiar with the differences of MAP sensors over the years...but it seems likely to me that one from a 96 should fit in it'* place. My thinking is that the connector is different simply for the newer style PCM of the 99. If I'm wrong hopefully someone could step in and correct me.

Once you do that, you can flash your 96 PCM with the tune of a 96 SSEi. A dealer can do this for you, if you can't do it yourself. This should get everything running properly and allow you to still drive the car. There is a "but", though...

The gear ratios between your trans and the SSEi trans aren't the same, meaning the shift points will be off. It should still operate and function acceptably as long as you are gentle with it (in other words, no redline!). That will need to be custom tuned, unless you swap for a different trans.

This is my thinking, as in 96 both the SE and SSEi used the 4T60E transmission...only differences were in the gear ratios and differentials. Thus the pinouts between the two PCMs should be the same, with the exception that the SSEi has additional pinouts for components like the boost control solenoid, which you can add yourself.

This will get you on the road to a proper running engine, after which you'll just need to calibrate it for the proper gear ratio. Just remember not to drive it too hard until then.

I won't deny that I am a little unfamiliar with the 96, so if anyone else could confirm or deny this, I would appreciate it!
.
.
.
LeSabreUltra is offline   Reply With Quote
Old 01-06-2010, 01:07 AM   #14
Junior Member
Posts like a V-Tak
Thread Starter
 
Join Date: Dec 2008
Posts: 28
Thanks: 0
Thanked 0 Times in 0 Posts
nightshade is on a distinguished road
Default

k ty guys for the help ill let u know after this weekend if the replacing the ait helped my mileage any
nightshade is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
IAT Sensor on 2001? And Computer relocation? VanFaasenC Performance, Brainstorming & Tuning 2 09-21-2006 01:05 PM
IAT sensor and trouble codes bonnevillemac 2000-2005 4 08-28-2005 11:29 PM
IAT sensor and trouble codes bonnevillemac Performance, Brainstorming & Tuning 3 03-11-2005 12:10 PM
IAT and other mods... kaylin4u 1992-1999 2 01-24-2005 01:21 PM
Tricked IAT Sensor 2000SilverBullet Performance, Brainstorming & Tuning 18 09-01-2003 02:39 PM


Tags
3.8. l67, 3800, bonneville, bonnie, iat, maf, ponitiac, rich, se, sle, sse, ssei

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 09:54 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.