4 replies to this topic

[Bean]

Hi All,
Wondered if you might be able to shed some light on our situation?

My 1986 City has recently been fitted with a 98 Mpi engine.
The engine has all gone together fine. It has been fitted with a replacement crank & shells, new mpi clutch and a 3.1 diff.

The ECU is from a running car, along with the alarm box and fob.

The car turns over.
The fuel pump works & primes.

We have fuel all the way up to the rail.

Our problems lies somewhere with the injectors, we think? The injectors don't seem to be squirting. We removed them from the block and turned the engine over, and there was no fuel released. (Unless they are earthed from the block, in which case, they wouldn't fire anyway.)

We have a spark and all plugs have been gapped.

We have checked relays etc. The main relay box is fine (we swapped it for a replacement, but no different.)

The battery is well charged.

The fuel cut-off has been reset.



If anyone has any ideas, that would be fantastic!

Thank you.

Bean
x

[Bean]

Bump?

[mini93]

could check if they are earthed bodies by resting them on the engine, obviosuly on a conductable part.

as i said before about testing if the injectores are opening, use a volt meter on top of the plug to the electrical conector upon cranking voltage will go to it...likely wont be able to check what volts its pulling as they are opening and closing (which is why i said before you need an osciliscope as it shows a wave form on a display which shows when it opens and when it closes....doubtful you have access to one though)

might be handy to get hold of an inline fuel pressure gauge because you can have fuel upto the rail but it needs to be pressurised to feed the injectores, if your fuel return is kicking in too soon you might have a problem, have you taken off the return line seeing if alot of fuel is coming back out? (im not sure how acurate that test is )

[THE STIG]

injectors are not earth throung the body

as running same injectors on mates supercharged mini and will fire when just held in the air

have a feeling the imoberlizer stops the injectors firing but will let the engine turn over could be wrong

have you checked all the plugs are fitted ie cam sensor etc as wont if cant see when to fire injectors

how do you know you have fuel at the rail ??

[Bean]

We checked for fuel by taking off one of the fuel rail connectors (with a suitable container beneath) and there was good flow.

Nothing at injectors though I doubt both have failed - we must be overlooking something?