Adrian

If any 964 owner has to undergo emissions testing DO NOT touch the CO2 adjustment unless you have a gas analyser fitted to the exhaust pipe and you are in the care of an expert who knows what he is doing.
Ciao,
Adrian.

John Boggiano

Just to update the scores...

9,1,20,9

Colin 90 C2

Update to this old poll.
This week I had to pull out my cat bypass and Cyntex chip for state inspection.

I was fearing stalling problems, especially since it was a nasty rainy week.

The conclusions: Stock chip and cat fitted- perfect idle, no rich smell from exhaust. life is good.
Stock chip with cat bypass back in- same as above, but power dip at about 5500rpm.

I guess that adjusting my air bypass screw fixed the stalling issue without effecting my emissions results.

I am waiting to get back my Escort Performance meter to see if there is a change from changing chips, even though by the butt dyno, there is a noticible difference.

LWF rocks!

hjcarlin72

I just had a LWF installed in my 1990 C2. Car ran fine, a little idle surge, and would stall if clutch was put in quickly from 2000 rpm especially with the AC on. Just installed an Autothority chip and it seems to have improved. Has not stalled since chip was installed. Chip is LWF and aftermarket exhaust, Fabspeed. Autothority also said that they had a modified idle air flow controller if I still had problems, but none so far. I would not be without my LWF.

Cupcar

I have the LWF factory equipped on my car.

I have not driven a C2 that has been equipped after production.

On the basis of my experience, I can't imagine having a car with a 15 pound heavier flywheel. This is a "nice piece of mass" to remove as the engineers say.

The car does take a little care to drive off without stalling, but hey it is practice for the day you can afford a Carrera GT.

Bud Taylor

I am hoping that at least some of the experiences here were due to other stuff...

I have read that there is one thing you need to clean (forget the acronym).

I just purchased the RS Kit from patrickmotorsports along with a new fuel filter and new 02 sensor. Since the car has 42K on the clock I figure the 02 sensor is close to EOL and the fuel filter is jsut cheap insurance. The guy at patrick motorsports asked me what octane I run and I believe in my area it is 91 octane.

I told him point blank the car is not tracked and if it stalls at lights I will have to return the parts. He said no problem. I am not sure who they use to remap their ECU's. My mechanic here at Carrerasports said he did one two years ago and had not heard back from the owner in that time frame (may have moved though or something who knows). I will vote and repost once the job has done. I am getting ready to roll the dice on 1K of labor so wish me luck.

Red rooster

Jason ,
Why a standard RS chip content ? That does not run in a non RS DME !


Geoff
----------------------------------------------------------------
KS400200,the oldest 964 on Rennlist,unless you know differently !

JasonAndreas

This is an old thread from two years ago, about a year and a half before I had figured out all the maps and variables stored in the ECU. I had assumed that with an RS & LWF not stalling with the same frequency as normal 964 that we could use the rom image from the RS. I never got my hands on a genuine RS rom image but I figured out the rest.

I spent a few hours going over a cup car rom image and nothing stood out (at me) that would prevent it from running in regular ECU. I never actually tried running the cup rom image but what I did do was take all the calibration data and transfer it to a regular rom image and that worked.

If you find that your car stalls with the LWF, sign up for a rennlist membership and then send me your mailing address and I will send you a chip that fixes the problem.

tbennett017

I am dealing with this: LWF + AC on a warm day(85Deg+).. Aftermarket (autothority) chip and MAF....3500 RPM and decelerating for a turn in traffic. Depressing the clutch can sometimes stall out the car.. which does make the RT turn a bit of a workout. I can pop the clutch.. but does that do any other damage? It does make drivability a bit of a concern.
I am going to clean the ISV, but does it work to blip the throttle any? OR upshift some first? I guess driver training (me) could help..

Also, this is the first have heard about a noisy gearbox with a LWF. In second gear for me, it does sound like a gravel truck sometimes when pulling out at 2200 RPM... is this common? Kind of a gear-based hiss up through the shifter... like my dad's 50 Chevy truck...
So I don't have to worry about this - go to MTL or anything?

TIA.

tbennett017

I am new to Rennlist.. and I am a little unfamiliar with your role... are you offering to send out fixes? Do you manufacture chips?

Feel free to PM me more info if this applies to me.. thx.

--tcb

TR6

I have a LWF and I just replaced my ISV with a brand new one (they don't get any cleaner than that) and mine still stalled a couple of times when I had everything turned on (A/C, fan, headlights, windshield wipers). So, while you may have some luck cleaning the ISV, I don't think it is the ultimate solution to the LWF stalling problem.

tbennett017

Yes.. and your recent thread about difficulties gives me pause about cleaning it at all... ;-)

Red rooster

Jason,

I did not see the two year difference ! The CUP cars first ran a std DME .
When the RS came along they switched to the RS software/DME .
The RS chip does not run in a std 964 DME so hence my question !

The RS was not wonderful for idle stalling either !Needed all the usual software updates .

Geoff
----------------------------------------------------------------
KS400200,the oldest 964 on Rennlist,unless you know differently !

Superunknown

I have the LWF and clutch and I have no problems whatsoever! Dont notice any noise increase but then i do have 2 bypasses and drilled airbox! Hmmm, it seems as though our friends on the other side of the pond have more problems then we do over here. Would that be a fair assessment?

Smokin

Jason burned a chip for me and it has made my car SO much more driveable. I've been reporting back to him periodically what my experiences are. I am actually on my 2nd chip from Jason. (He sent out another one to me earlier this year after he made a few more tweaks.) I can't believe that I drove the car for 3 years the way it was. The specs and instructions that came with the LWF call for a piece of rubber tubing to increase the throttle gap... A cheap fix at best and one that never worked! Jason's chip has solved 95% of my stalling problems.

I do have a Hall Sensor code that keeps coming up and have not had the time to track it down yet. That may be a contributing part of my stalling issue... I don't know. I'll be getting to that in the next few weeks.

Jason... I haven't PMed you in a while because I have been driving the Hummer mostly as I need to haul stuff around... But the chip is still running strong! I should be back to driving the Porker more often... I'll keep you posted.