Mr C

iTrader: (2)

what changes after 10 sec on a Cossie engine?
I have now noticed a split in the aeromotive fuel regulator membrane leaking fuel into the inlet via the vacuum pipe could this cause poor running as stated?
We wired up the engine today and got it to turn over, it ran really smooth for 10 sec then it died, turned it again it ran then died and so on, any idea?
Std 4x4 with MSD wasted spark and closed loop, Any more info needed I have a project thread to take a look through.
Fuel pump works fine till engine cuts out, fuel is returning to the tank too, there is spark untill it dies so could it be a feed to ECU or coil or something that changes after start up or?? It ran for the exact amount of time each time too so
is it a sensor failure, air leak or what??

mechanic28

iTrader: (5)

base idle might require set up?

Tev

iTrader: (2)

Get some 1 who knows what they r doin when it comes 2 wirin

Moonstone Mart

iTrader: (1)

lol
good to meet you guys today, cars looking good mark
found my way out and back to the M1 really easy, shame that wasnt the case on my way there!
Hope you get it started soon.

Mart.

Mr C

iTrader: (2)

Not you then?

How does it idle perfectly for 10 sec then? is this set and parameters change after that you think?

Tev

iTrader: (2)

Haha, yer man good 2 c you, not easy navigatin round the leics, will have 2 take a look at ur resto fella

Tev

iTrader: (2)

M8 its propper pissed me off, so close but so far, its gotta b a simple fix,

it cant b the base idle though as the ecu worked fine on my car

Moonstone Mart

iTrader: (1)

I can see this is annoying you so i would be glad to help you out by taking it off your hands for Ł1,000

Just trying to find your resto thread to have a look through.

Mart

Mr C

iTrader: (2)

BTTT need something to work towards this weekend

chrisreid

iTrader: (2)

try unplugging the MAP sensor and trying that mate

Mr C

iTrader: (2)

Will the engine even run without this plugged in? what will this show if I do?
I have now found a fuel leak into the inlet via vacuum pipe-could this cause engine to cut?

jon@work

iTrader: (5)

If you get it started/running without the map sensor, I'd be surprised

If the diaphragm has split and is leaking, then you'll have very little fuel pressure, so yeah I'd have thought that this was a plausible reason for the engine cutting out quickly.

Mr C

iTrader: (2)

thats what I thought, Aeromotive open on a sunday? gutted truely gutted

chrisreid

iTrader: (2)

i used to do fuel injection and dianostics and worked on several cosworths. I have had a cossie which started up for couple of seconds then cut out and didnt start. it had spark and had injection pulse, but i fold out later that the injectors was only pulsing couple of times then cutting the power. Unplugged map sensor and it started. MAP sensor was the fault. fitted a new 1 and perfect. also my mates car did the same thing and it was the MAP sensor. If a map sensor or mass air flow sensor is unplugged you can start a car and it will run. if the sensor is damaged like on alfa romeos or vauxhalls which lack power and wont take throttle you can unplug the mass sensor drive the car with them unplugged and if the car drives perfect then u no its the sensor. if its still the same then its not the sensor

Mr C

iTrader: (2)

Thanklyou "chrisreid" good statement thanks, it will be my first sensor swap after the faulty fuel reg part is replaced then.
Good of you to take the time to explain

Mr C

iTrader: (2)

Problem sorted, leaking regulator wetting spark, new Fuelab item used instead

Moonstone Mart

iTrader: (1)

Ooooo that looks posh!

Welldone on getting it running mark!


mart.

mechanic28

iTrader: (5)