1988 CABBY.....work in progress....PIC HEAVY

[mileycyrus]

http://www.auto-solve.com/mech_inj.htm

found this...lol

[mileycyrus]

correct me if im wrong.....the stock pump is capable of 120psi....but runs at about 75psi....and the Airtex E3240 pushes 95 psi.....so in theory...this should work...

[Romeo Chi]

I would imagine it would not work because the way CIS delivers fuel. Digifant is a digital fuel control system as apposed to CIS mechanical fuel control. You change the rate of fuel delivery over the stock rate and you will have to find some other way to manage it.

Someone else with much more experience than me could possibly chime in with the PSI it requires and maybe you could get something to work with one pump.

[Romeo Chi]

Found this on the Golf Jetta forum saying that its between 68-78 psi

PUMP PSI

[mileycyrus]

thats good.....if so...than this pump should work....i really cant see why one pump is unreasonable.....i had even considered keeping the accumulator....that way i might not loose pressure due to starving in the tank in cornering....i dont know...this seems like a no brainer but it seems the more i read the crazier it seems to do.....the old cis setups had one inline pump and a type of pick-up in the tank....so i fugue i can make this work....as long as the pump is strong enough, which from what i can tell is fine with this one...i just like i said, as long as the lines are run right where the old inline job was...it should by all rights work fine, and may even be more efficient.

[mileycyrus]

outside of all this.....my tank is disgusting.....im going to drop it and gravel clean the inside while im messing with all this fuel pump crap.....i think starting fresh and clean will be a very good idea...

[mileycyrus]

CIS from what ive read is a manual fuel injection system that is mildly adjustable.....givin this info, and the fact that the pump simply delivers the fuel....at a certain psi....the pump swap should be a non issue....as long as the replacement pump is able to provide the right amount of pressure, it shouldnt matter if there is 1 or 15 pumps....with this said that pump i ordered should be fine considering the psi specs i researched..cis needs 68-78psi....and the pump makes 95psi...then i can richen or lean out the mixture accordingly once its in and running....this to me is more a matter of basic logic versus theories.....and logically this will work.....why they made this car with two pumps baffles me....i get the starving issues....but most every other car made has one....and they all dont starve.....it seems it would have been more efficient and cheaper to have made this or any car with one pump...

[mileycyrus]

ok....the Airtex E3240 runs at a range of 65psi min. to 95psi max.....

[mileycyrus]

This conversation would be so much cooler if i werent talking to myself.....

[Romeo Chi]

This conversation would be so much cooler if i werent talking to myself.....

Uh.... get the pump and put it in, tweak it. Let us know how it goes. Lay off the caffeine.

[mileycyrus]

lol...

i actually drove it tonight......new oil in...cleaned the plugs....jumped it....and it ran, it was a bit rough at 1st but after it warmed up...i went all over the neighborhood and it was fine....crazy...so i guess that rotted fuel line was the biggest part of the problem.....it did however overheat...dunno why yet...but ill tinker with that later...

[mileycyrus]

still starting and running, almost right at 1st key turn.....jumping it btw, as i havent bought a battery yet.....anyway...its still overheating/purging coolant from the res./fill jug while it sits idling in the driveway.....and the fan doesnt come on...but i think i got out all the air, as i did flush the cooling system a few months back long before i ran the motor......so after reading all sorts of threads on here...I have removed the top hose and filled both the block and the radiator but it seems i still have some tinkering to do with the cooling system and such.....oh another question...it seems the whoe time ive had the car, when driving the temp gauge on the dash bobs all over, going up on acceleration, is that something common?

[mileycyrus]

UPDATE.....

ok...no longer overheating.......when i flushed the coolant system i forgot to put the fan/temp sensor plug bag on the radiator...duh.....

anyhow, I drove it all over the neighborhood again, put gas in it, and got on it a bit with no problems...however, the main fuel pump is in fact whining, and......without a battery i would come back to the house every round or so to look at everything....meanwhile the car ran and idled the whole time, actually the motor gradually sounded smoother...idles really nicely.....but the last attempt for another run around the block......it shuttered.....than stalled.......remember the no battery part....just pushed it home alone.....thank god these are light cars.....SO....BACK TO THE ORIGINAL ISSUE......fuel pumps...dying...YES....new pump should be here tomorrow....then the real project is on......

[Beetle.freak]

CIS should be 85-90psi.......how much for the Clipper stuff ?

[mileycyrus]

CIS should be 85-90psi.......how much for the Clipper stuff ?

the pump i got makes that.....hopefully it works...

as for the clipper kit....im not looking for much.....make me an offer...they need paint...

[Beetle.freak]

Depends on your location, im in Wv and very close to western Md.

[mileycyrus]

Im in Florida.....Tampa area...

[Beetle.freak]

Thats not to bad then.....what all do you have to the clipper kit ?

[mileycyrus]

the whole thing.....front and rear bumper skins....flares, and side skirts..

[mileycyrus]

im using the rear steel bumper support....but i have the front that can go with it....but shipping that would be retarded...lol

[mileycyrus]

Started it up this morning to back it up more into the driveway....started right up.....no pump whine...and it idled smooth....

[JennyintheCabby]

LOVE it!
The random side with paint is awesome, did you make the VW logo with ears like deadmau5? (:

[mileycyrus]

that was actually an accident.....i was just doing it with no idea how i wanted it to look....so...it is supposed to be a VW logo with crossbones.....but...after outlining, and repeated layers....it got a bit blobbed up....lol

[JennyintheCabby]

lol oh well it looks good, and I love the rabbit stencil . came out perfect.

[mileycyrus]

thanks man...

[35i 2000]

looks awesome!

[mileycyrus]

thank you guys....thats nice to hear.....ive seen a huge amount of negative feedback....this is a bit refreshing....

[mileycyrus]

http://apps.bosch.com.au/motorsport/.../fuelpumps.pdf

ok...just found this....the stock inline pump for my car makes 5 bar....72.5psi.....now...with that said...there is no rational explanation as to why this wont work....the pump i ordered makes 85-95psi....

CAN ANYONE GIVE ME A REASON WHY THIS SHOULD'NT WORK?

based on the basic mechanical functions of a fuel delivery system....this will work fine...as long as the pump can be installed properly to ensure maximum pickup of the said fuel, it can and will push it to the motor with adequate pressure for CIS....

makes sense to me...

[mileycyrus]

started it again tonight......no fuel pump whine.....hmmmmm

[Beetle.freak]

My 88' gave me fits last summer......started up and ran great for about 10-15 minutes then buck, shutter and shut off, wait about 5-10 min and she'd start back up and run for a lil while ...swapped in-tank pump and hasnt done it since (knock on wood) !!! As for your pump idea, the pressure may be fine but what about volume ?

[mileycyrus]

ok...there is a part of the distribution block, on the back side....an electrical unit...two fuel lines run to it, and an wire plug in....it whines kind of....so while the car was idling i unplugged it...and the car idled very rough, but didnt stall...since, now it whines...car idles fine...but it stops periodically and the car idles low and rough....it appears to be dying...but i have no clue what it is!! HELP

[mileycyrus]

started it again.....and that "thingy"....back to whining consistently again....the issue most worry some is that it does seem to idle smooth....but after when i rev it to drive, even just a bit going into gear... then let it drop back to idle....it drops lower...the lights dim...then it smooths back out again...but my drop in RPMs is what worries me.....what controls the consistency and stabilization of the idle..??

[mileycyrus]

My 88' gave me fits last summer......started up and ran great for about 10-15 minutes then buck, shutter and shut off, wait about 5-10 min and she'd start back up and run for a lil while ...swapped in-tank pump and hasnt done it since (knock on wood) !!! As for your pump idea, the pressure may be fine but what about volume ?

i just checked the volume.....the one i ordered is rated at 40 gallons per hour.....which is 151 lph..

so i think im good....

[mileycyrus]

and all i can find about the stock one....is that its capable of 4-5 LPM.....which is like 240-300 LPH...so crap.....

i cant find accurate ratings for either of these pumps......

[mileycyrus]

my deduction.....

REASON this doesnt work.....isnt simply the psi needed, but also the volume....so it seems this airtex pump pushes hard enough, it just doesnt push enough fuel to do the job....so its smaller?..smaller inlet/oulets?....

But....considering the CIS system runs primarily on pressure, considering that almost 99% of the fuel slammed into the distribution block goes back into the tank via the return line....maybe it could work and the amount of return fuel will be less.....

the real question is just that....which does it need more....pressure or volume..?

and....doesnt the pressure vs. volume become null and void when you consider that no matter how hard you push the fuel only so much can fit through the line?....so does the fuel line size increase the psi, or decrease the volume?......