wheelwizardrefurbs

Ok i finally got my car running (sierra cosworth L6 ecu stage 1) but it has a horrible hesitation problem under load, it idles perfectly and if i slowly rev its great but if you blip the throttle or floor it it just goes mental, i have changed the following items

Crank sensor
Phase sensor
Dizzy cap & rotor arm
New spark plugs
Timing is ok
all gaps are good

Its driving me insane could anybody help with suggestions! Thanks!

Sierrasideways

iTrader: (1)

Coil? FPR?

wheelwizardrefurbs

hi mate i will try another coil as i dont know much about the one i fitted also i fitted an adjustable fpr set to 3 bar. cheers

Sierrasideways

iTrader: (1)

Best o' luck. Keep us posted

wheelwizardrefurbs

thanks mate i need it lol

jamie's

How did you set the fuel pressure reg?
Was the 3 bar set with the vacuum on or off?
Is it definately a rising rate type regulator?
Check voltage at fuel pump as well

wheelwizardrefurbs

hi mate the regulator is just an ebay cheapy jod 3 bar was set with the vacuum off cheers

wheelwizardrefurbs

just a quick update the spark plugs are thick with black soot (DRY) it also pops and bangs when revvved hard. cheers

Mad_Mat

Cheapy fuel pressure regulator

wheelwizardrefurbs

so i take it you think a genuine reg will sort my problem out?

wheelwizardrefurbs

??? mad mat

1300gt

iTrader: (2)

Check your alternator output voltage is good and consistent... Fuel pump and loom/conections. How is your ECU loon conections and harness

mjonathan24

iTrader: (1)

if its not been run for a while it may need a bit of a setup

Mad_Mat

I have no idea if it will sort it. My point is fuel pressure is critical on these Turbo motors and you have a cheap n cheerful regulator fitted. Cheap is fine as long as it works bang on.

I thought fuel pressure should be 3.5bar with vac hose disconnected? Dropping to roughly 3bar at idle with hose connected.

Can someone else confirm please before this chap melts a piston.

wheelwizardrefurbs

Hi mate sorry thats what i meant i set it to 3.5 bar with vac off and it drops to 3 bar with vac connected, my alternator is brand new 65 amp would that cause such erratic behaviour? fuel pump is brand new 044, connections all seem fine mate, i may change the regulator for a standard one if i can find one.. thanks for the replies.

gcfcos

I'm sure Alternator should be 90amp on a Cossie. Mine is and so are a couple of mates ones that I've replaced alternators on.

wheelwizardrefurbs

hi mate yes ive checked and apparently there is a 70 and a 90 amp. but do you really think this would make a massive difference? cheers.

Turbosystems

iTrader: (5)

70 amp is for non heated screen models 90 amp is for heated screen models

You can use either on the non heated screen models

RobertM

Check your MAP sensor, i had the same problem.
Luckily I have a monitor so I saw right away that my MAP pressure
shouldn't be 1 bar with engine turned off.

wheelwizardrefurbs

thanks for the replies guys, i am deffinatley going to try the map sensor as its popped up a lot in conversations with others. i dont have a heated screen mate so hopefully it should be ok. cheers again

wheelwizardrefurbs

SORTED!