Big problem with conversion!!

[REGGY5GT]

ive put the volvo engine in and done all the plumbing,ect, runs fine, idles fine revs up in nuetral fine, everythings fine except when you drive and hit 2500 rpm then it just misfires like **** and wont accelerate,it feels like the ignition is being turned off and on very quickly, it ran fine when it was in the volvo and i havent adjusted anything,ect, it does have a brass bleed valve on the actuator pipe but ive wound it all the way out to take overboosting out of the equation,the problem happens everytime the boost is about to kick in,is there a boost sensor plug or something ive missed ect?? any ideas?? thanks.

[Brigsy]

Bleed valve should be wound all the way in for minimum boost?!

[TrixNFlix]

As brigsy says sounds like your overboosting and the ignition module is cutting the spark. Boost needs to be set below 0.9 bar

[Trevhib]

Bloody hell, lol. Good job there IS a cut off!

[REGGY5GT]

Ive tried turning the bleed valve right in to no joy,blanked dump valve and its slightly betterg.just coughs and splutters when it hits 2500 and wont accelerate.its boosting at about .5 bar and correct me if im wrong but thats standard.any help with this would be appreciated,tim

[Brigsy]

What fuel pump have you got fitted?

[REGGY5GT]

Its got a standard gt pump on it,new filter,i was told that standard gt pump would be ample for b18ft.

[Brigsy]

It all depends which pump you have?

The ph1 bosch may be up to the job but i doubt the standard ph2 pierburg fuel pump will be.

[SCHWARTZ]

aparently that pump will be ok but i got a more powerfull one just in case. might help to get some pix up someone might be able to pick up on something doubt it but you never know.

[REGGY5GT]

Its got a ph2 pump,its ok until you hit 2500,i gave it some today and managed to get past the misfiring at 4000 then it ran ok after 4000,is there a decent pump i can get from my scrappy?thanks lads.

[SCHWARTZ]

mk1 golf gti, any 1990 bmw with a big engine,escort rs turbo. These pumps will fit in the fuel pump bracket as well.

[Haz]

sounds like a boost leak. pressure test the system. definately loose the d/v unless its re-circ as can stutter on gearchange too. if its tryin to boost more than 8psi on a std ecu it will cut boost tho.

[dave r5]

I had this problem. Twice. First time was no power to air flow meter
second time I had a duff coil.

Have u got the idle control valve plumed in properly

[REGGY5GT]

Ay up lads,ive finally sorted the problem, went and got a rs pump off my mate and put it on,its sorted it and it goes like **** even on standard boost,thanks to all you who have wrote on this thread and a big thanks to scoff for the help via pm's,thanks lads,tim

[dave r5]

wooohoo good lad


how many volvo powered 5's are there now

mallorys gona be fun

[TrixNFlix]

wooohoo good lad


how many volvo powered 5's are there now

mallorys gona be fun

[Markey Mark (BD)]

wooohoo good lad


how many volvo powered 5's are there now

mallorys gona be fun

Sounds like there's quite a few out there now, very popular conversion.

[dave r5]

is yrs running yet mark mark

[Markey Mark (BD)]

is yrs running yet mark mark

No not yet, its back out at the minute to have the gearbox repaired, i managed to snap the speedo sensor in box.

Going back in for final time when box is done then its wiring the thing up.