88 Fox injection

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In article >, dave AKA
vwdoc1 > wrote:

> check the ground wires on the cold start valve bolts.
> check ALL of the fuses at the fuse box.
> I think you have CIS-E and that electronic fuel pressure regulator needs
> electricity to function.
> Check that main fuel distributor boot for a massive crack or hole.
>
> Bentley, VOM tool, maybe a fuel pressure tester and have fun. ;-)
>
> later,
> dave
> (One out of many daves)
>
>
> "rush ville" > wrote in message
> ...
> > Greetings,
> >
> > My 88 Fox is getting fuel to the cold start injector, but not to the
> > regular injectors. the car will run untill the cold start injector cuts
> > out . I'm thinking it's the distribution unit. any ideas, and insights
> > are appreciated.
> >
> > TIA, rush
>
> Greetings,

I just replaced the fuel filter, and checked the transfer pump ( fun
job ), still nothing... I don't have access to a fuel pressure gauge,
but I'm thinking that's not the problem as it's getting enough pressure
to fire the cold start injector.

I'll check the fuses, and other electrical connections.

Thanks all, Rush


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Greetings,

My 88 Fox is getting fuel to the cold start injector, but not to the
regular injectors. the car will run untill the cold start injector cuts
out . I'm thinking it's the distribution unit. any ideas, and insights
are appreciated.

TIA, rush

"rush ville" > wrote

> Greetings,
>
> My 88 Fox is getting fuel to the cold start injector, but not to the
> regular injectors. the car will run untill the cold start injector cuts
> out . I'm thinking it's the distribution unit. any ideas, and insights
> are appreciated.
>
> TIA, rush

Just a side point, that would not help the matter: did you check that your
fuel filter is not clogged?

Harry

check the ground wires on the cold start valve bolts.
check ALL of the fuses at the fuse box.
I think you have CIS-E and that electronic fuel pressure regulator needs
electricity to function.
Check that main fuel distributor boot for a massive crack or hole.

Bentley, VOM tool, maybe a fuel pressure tester and have fun. ;-)

later,
dave
(One out of many daves)


"rush ville" > wrote in message
...
> Greetings,
>
> My 88 Fox is getting fuel to the cold start injector, but not to the
> regular injectors. the car will run untill the cold start injector cuts
> out . I'm thinking it's the distribution unit. any ideas, and insights
> are appreciated.
>
> TIA, rush

Harry
I've had this same problem for almost a year with my '87 Jetta 16V.
I have not yet found the problem, but here's what I've done:

Replaced fuel filter,
Checked transfer pump
replaced main pressure pump after it failed the volume test

Still didn't work.

Sent it to a "shop" that basically failed to fix it, sent it back in pieces.

Started taking things apart at home, cleaned, re-set the air flow disc,
cleaned the throttle body, cleaned the fuel distributor, replaced
everything carefully.

Didn't ever find anything wrong, but it now starts and idles nicely, but
it won't rev unless I let it build up slowly. It will die if I press the
pedal normally. At this point I'm suspecting either timing or knock
sensor. Might have been knock sensor all along.

By the way, the cold start valve doesn't work over 86 degrees farenheit
- it's not needed. Took me a while to get past that

Not much help, but I'm getting close

- -
Rex Burkheimer
WM Automotive
Fort Worth TX

Harry wrote:
> "rush ville" > wrote
>
>
>>Greetings,
>>
>>My 88 Fox is getting fuel to the cold start injector, but not to the
>>regular injectors. the car will run untill the cold start injector cuts
>>out . I'm thinking it's the distribution unit. any ideas, and insights
>>are appreciated.
>>
>>TIA, rush
>
>
> Just a side point, that would not help the matter: did you check that your
> fuel filter is not clogged?
>
> Harry
>
>

dave AKA vwdoc1 wrote:
> check the ground wires on the cold start valve bolts.
> check ALL of the fuses at the fuse box.
> I think you have CIS-E and that electronic fuel pressure regulator needs
> electricity to function.

Dave. as I understand it, CIS-E should function purely mechanically.
That is, if you were to unplug the electronic fuel control parts it
should still run. The electronic portion is an add-on that just
fine-tunes the mixture. Is that not correct?

No I think if that Fuel Pressure Regulator, an electronically controlled
one, does not get electricity it might cause the fuel injectors not to get
enough fuel pressure thereby not allowing the fuel to exit via the
injectors. NO GAS!

I am talking about the Fuel Distributor with the rectangular box (FPR),
connected with 2 screws, and an electric plug.

later,
dave
(One out of many daves)


"Rex B" > wrote in message
...
> dave AKA vwdoc1 wrote:
>> check the ground wires on the cold start valve bolts.
>> check ALL of the fuses at the fuse box.
>> I think you have CIS-E and that electronic fuel pressure regulator needs
>> electricity to function.
>
> Dave. as I understand it, CIS-E should function purely mechanically. That
> is, if you were to unplug the electronic fuel control parts it should
> still run. The electronic portion is an add-on that just fine-tunes the
> mixture. Is that not correct?

"Rex B" > wrote

> Harry
> I've had this same problem for almost a year with my '87 Jetta 16V.
> I have not yet found the problem, but here's what I've done:
>
> Not much help, but I'm getting close

It is obvious, it is not getting fuel. If you can't find the problem, though
this may sound quite trite. as the goal is to find the specific failure, and
you say you are getting fuel volume- you may want to hook up a pressure
gauge to the fuel line too beside just going by volume - lacking diagnostic
equipment - you may want to consider just swapping components from a junk
yard from a Fox - as a last resort - may cost 20 or 30 bucks or less - I
have seen a number of Foxes at our local yard at times.

Harry

I suspect, perhaps, the diaphragm pressure regulator. If the differential
pressure regulator failed it should still run even be drivable.

You can test the pressure of the diaphragm pressure regulator jumping the
fuel pump overriding the relay.

Should be around 80 psi at that point. You may want to drop in one of those
pull-it-yourselfs and pull a diaphragm pressure regulator out of a Fox -
maybe 5 or 10 bucks.

Harry

> Should be around 80 psi at that point. You may want to drop in one of
> those pull-it-yourselfs and pull a diaphragm pressure regulator out of a
> Fox - maybe 5 or 10 bucks.

In other words. it has a pressure limit - if this is faulty it could be
sending back to the fuel reservoir at a much lover pressure than it should
or worst yet it could be stuck open to send the fuel back, thusly, no system
pressure. They system pressure is created by the fuel pump and regulated by
this (diaphragm pressure regulator).

Harry