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944 turbo s (silver rose )


ORIGINAL: Frenchy

GPF, do you have a 28 pin " performance " chip going spare, 3 bar FPR, Resprung wastegate etc it is for my 220 which is 24 pin, but i suspect the ECU may be faulty, i have a nearly new later ECU 28 Pin.
Jim.
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I have at least one Guru Racing chip and one ProMax chip. I have been meaning to eBay them for ages but not got round to it, as usual!

However, I would think they will both be too rich for your boost level as they will be mapped for 18 psi with a bigger turbo than yours - assuming you still have the k26/6 ?
 
Ok put the chip in and emissions running at 4% and down to 1.8% when revved so still a bit high but much better set fqs to position 2 and now down to 3% and down to 1% which would you guys say was the best setting with this being a non lambda turbo car ?


Anyway problem just about solved I think thanks for all the help.

Now to the next problem, my wiper arm mechanism keeps comming off in the bulkhead do I need a whole new mechanism or can I just replace the plastic insert ?

 
Hi I'm interested in the promax chip set, did you get my pm a few days ago? Do u have another upgrade parts 4 sale? Or anyone else.

Thanks
 
Hi Terry - no I didn't.

Just checked and my PM inbox is full and has been for a couple of weeks - oops, why don't they email you when it gets full?!

I'll see if I can find the instructions for the chip and confirm the version. I'll let you know asap mate. :)
 

ORIGINAL: gaz924s

Ok put the chip in and emissions running at 4% and down to 1.8% when revved so still a bit high but much better set fqs to position 2 and now down to 3% and down to 1% which would you guys say was the best setting with this being a non lambda turbo car ?


Anyway problem just about solved I think thanks for all the help.
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Hi Gareth, that's strange - the chip I did you should give you a slightly leaner idle than the one you borrowed from your brother's car.[&:]

How are you getting these %age measurements? Is it possible to check your brother's car in the same way to compare the two with the same chip in - I'm thinking that you still have another issue with your car somewhere, so a back to back check with same chip and measuring equipment would be handy.

Have you checked the TPS is set correctly on yours?

I presume you are taking the readings when the car is fully warmed up? (sorry, had to ask though [:D])
 
Yes car is warm I have a friend a few miles away who is mechanic and I use his Bosch machine to get readings.

Brothers chips are promax and he has lambda so bit of a problem there

Swapping the chips has taken it down from 6-7% to 4% so it must have done something ?

Payment is sent as well
 
Are you still on fqs2?

If so, you need to be on fqs0 - the part throttle and WOT fuel maps are dead standard.

Just noticed in your previous post you say your brother's chip is a ProMax - was your car ok with that?? You said it idled ok....

If so, are you sure you have no mods fitted now - FPR, injectors??

How was it running with the Superchip?
 

ORIGINAL: GPF

Are you still on fqs2?

If so, you need to be on fqs0 - the part throttle and WOT fuel maps are dead standard.

Just noticed in your previous post you say your brother's chip is a ProMax - was your car ok with that?? You said it idled ok....

If so, are you sure you have no mods fitted now - FPR, injectors??

How was it running with the Superchip?
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No it is running on fqs 2 as it runs best on that I have stated the emission results for both settings which would you choose ?

Promax chip was ok in my ecu but is set for 18 psi so don't know how it will be on this on boost.

Fpr checked and running 2.5 bar. Injectors ultrasonic ally cleaned new filters and checked

I'm at a bit of a loss
 
How did you check the FPR was running at 2.5 bar?

Also, what colour are the plastic tops on the injectors?
 
The more I think about this, the more I'm convinced that you have a 3 bar FPR fitted, whis is why your car ran ok off boost with your brothers ProMax chip.

I'm not certain, but I think that ALL the ProMax chips need a 3 bar FPR.

If you have tested yours by just putting a gauge on the fuel rail while the car idles, and didn't also disconnect the vacuum pipe it will show 2.5 - which is 3 bar pressure differential between the fuel rail and the vacuum at idle in the inlet manifold.

 

ORIGINAL: GPF

How did you check the FPR was running at 2.5 bar?

Also, what colour are the plastic tops on the injectors?
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The injectors are green top

Used a snap on fuel preasure gauge screwed into the rail at the end and tried the vac on and off and still 2.5 bar as it happens I tried the fpr off my 924s as well as the part numbers match
 
OK, green top is correct for the injectors.

However, you should see different fuel pressure at the rail with FPR vacuum line connected & disconnected - it should be higher with it disconnected and that gives you the rating of the FPR.

So, if you are not seeing lower fuel rail pressure at idle with the vac line on something is wrong - either with the FPR or with the vacuum line. Can you trace the line and make sure it actually has vacuum at idle?

If the fuel pressure is really not varying with manifold pressure/vacuum you will be running rich at idle and on trailing throttle as you will have about 3 bar pressure differential, and very lean on boost as you will have less than 2 bar.....so keep off the boost until you get it sorted!
 

ORIGINAL: GPF

OK, green top is correct for the injectors.

However, you should see different fuel pressure at the rail with FPR vacuum line connected & disconnected - it should be higher with it disconnected and that gives you the rating of the FPR.

So, if you are not seeing lower fuel rail pressure at idle with the vac line on something is wrong - either with the FPR or with the vacuum line. Can you trace the line and make sure it actually has vacuum at idle?

If the fuel pressure is really not varying with manifold pressure/vacuum you will be running rich at idle and on trailing throttle as you will have about 3 bar pressure differential, and very lean on boost as you will have less than 2 bar.....so keep off the boost until you get it sorted!
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Sorry should have stated ran at just above 2 bar on tickover remove vac and goes to about 2.6 bar bit more if you rev it and it is directly responsive with the throttle

Vac system is new and silicone hose
 

ORIGINAL: gaz924s

Oh and I have tried two fpr's and both the same
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In that case as Graham said you may have a problem with the vac lines, are they original? if so probably overdue for being renewed as the plastic hardens and doesn't seal properly, perhaps a good time to upgrade to some nice new silicon lines.

Pete
 

ORIGINAL: gaz924s

Vac system is all new and done in silicone !
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then may be something connected to those lines that's leaking, recirculating valve perhaps?

Pete
 
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