[motorboy]

hi guys ive asked before about this problem and still cant sus it out ive fitted ralliart ecu to my 5 my actuator was knackered so yesterday i fitted my forge one its had new ngk iridiums when i accellerate hard up to 1bar and above it pulls back as if its running on 3 cylinders im running a blitz dsbc to up the boost and disconnected it like weebl said on saturday and connected the boost pipes back standard straight to the actuator it boosted up to about 0.8 bar and was slow but completely fine didnt run poor at all but when i go above it plays up like hell and no i havent changed the fuel pump yet but the filter has been done

 

[Weebl]

Hmm, If you have changed the plugs and it runs fine at low boost but not high, coil packs and leads next.

See if you can get a single coil pack and you can swap it one at a time so you know which one is knackered.

Did you make sure the gaps on the new plugs were set right? They are a cooler running spec as well i presume?

 

[motorboy]

hi weebl i pmd u about this problem i did just fit the plugs without checking gap to be honest wot thou is it supposed to be i also need to find someone local with a coil pack as dont wanna purchase till i find the problem is that all it could be then?

 

[Weebl]

Set the gap to .7mm and that should be fine.

It certainly could be a gapping or spec problem, the higher boost stops the spark making the gap. What spec plugs did you put in?
Hotter plugs and a bigger gap would certainly do this.

 

[motorboy]

hi mate i fitted ngk laser iridiums igr7a r they anygood

 

[Weebl]

hi mate i fitted ngk laser iridiums igr7a r they anygood

Yep. They are standard heat range plugs but to be honest, they are new and should not be causing problems at ~1 bar.

Check the gaps (although they should come pre-gapped) and then it is going to be leads and/or coil packs i am afraid.

 

[motorboy]

ok mate is that all the problem could be then and will them plugs support higher boost figures so ill try the leads first and check gap setting thanks mate

 

[mevolution]

motorboy

I have the same problem, if I run the standard ECU it will run up to 1.2+ bar with no fuel cuts.. or holding back.. But if I put my Ralliart Ecu in with the below mods:-

Greddy Boost controller.
Turbo Back Mongoose Exhaust
Apexi Cone filter
Denso Iridium Plugs

It will Boost up to 1 Bar fine but it feels like it is holding back after 1 Bar. (A bit like a fuel cut )

This is with out the fuel pump being fitted....

I believe that I require the fuel pump to be fitted before I can go past 1 Bar. As standard on the car is 0.9 bar. I am therefore waiting to fit the fuel pump before fitting the Ralliart Ecu again....

Weebl do you believe this to be the case...


Dave

 

[Weebl]

Weebl do you believe this to be the case...

No.

Fuel pump is good for a fair bit more than a bar boost, unless it is completely knackered.

 

[mevolution]

Hi Weebl

I do not understand why it is holding back after 1 Bar as is "motorboy's".. As with the standard Ecu I can run up to 1.2 bar nearly 1.3 with out any fuel cuts at all..

It feels just like a fuel cut but at 1 bar... with the Ralliart ECU (RA420996R1)

What else could it be then?

Dave

 

[Weebl]

Hi Weebl

I do not understand why it is holding back after 1 Bar as is "motorboy's".. As with the standard Ecu I can run up to 1.2 bar nearly 1.3 with out any fuel cuts at all..

It feels just like a fuel cut but at 1 bar... with the Ralliart ECU (RA420996R1)

What else could it be then?

Dave

Could be a problem with the ECU.

 

[Dmac1969]

It could also be something as simple as spark plug leads. 'WoodyEvoI' had the exact same problem with his (albeit standard) EI GSR , the car was fine off boost and town driving ect , but when you started to cane it , the car dropped onto 3 cyls untill you backed off the throttle a bit , then all became well again. New leads cured this instantly.

 

[mevolution]

I have just been down to the garage and seen that the Denso plugs i got were the IW22#4's and I believe that to increase the boost I need IW24's...

Would that make the difference when putting in the ralliart ECU as it would be putting in more fuel with the increased boost... and so blowing the plugs out..

Please tell me so as I am now running out of ideas..

Dave

 

[motorboy]

hi all after still haveing problems with the car pulling back on higher boost i was just lookin through wot to do next and came to leads and coil packs not wanting to pay out more money til i was very sure it was them at fault a friend of mine said disconect the sas/egr vacuum pipe off the valve and i blanked it off and dont know if this was just a co incidence but the car pulled like a train rite up to 1.4 bar without any probs ill try it tommorrow again but still not convinced that has cured the problem but can anyone tell me why would the sas cause pulling back help

 

[mevolution]

motorboy which pipe... do you mean the one to the fuel reg...

 

[motorboy]

hi mate no there is a vac pipe wich goes onto the egr/sas valve its on the rear

 

[mevolution]

It may sound daft but what is the sas/egr valve



Do you mean the "Secondary air control solenoid Valve"

if not can you add a picture.

Won't it stop it from running correctly with this disconnected.

 

[FLYER1]

i had the same probl;em on my 2 when acce l hard on motor way would feel like only firing on 3 back of for a while and perfect
short drives was fine ; got new pump and fuel reg and was perfect;