PDA

View Full Version : Bosch Fuel Distribution Unit



zgu954
06-27-2013, 01:24 AM
I have a 1985 TVR 280i that has a fuel distribution unit with the valve in the unit stuck in teh up position. Anyone have a suggested fix for this problem?

Regards,

Leonard

DrEntropy
06-29-2013, 04:45 PM
Bosch CIS, yes?

The head can be taken off the distribution unit and with a soaking in mineral spirits it may loosen up the "plunger". My CIS books are locked away in the attic, but the units aren't all that complex.


Not TVR specific but will give you some insight: http://www.google.com/url?sa=t&rct=j&q=bosch%20cis%20fuel%20distribution%20unit&source=web&cd=6&cad=rja&ved=0CEgQFjAF&url=http%3A%2F%2Fwww.porsche928forums.com%2Fdownlo ad%2Fmanuals%2FCISRebuild.pdf&ei=5kXPUYu4GYny9gTytIH4AQ&usg=AFQjCNH3_E6K45yVbwQZFzmGM45tqp8hBg&bvm=bv.48572450,d.eWU


Be aware of the O-ring advice after you get the plunger out. And report back here if this helps, please?

DrEntropy
06-29-2013, 04:49 PM
More than you ever wanted to know:

http://www.gobookee.net/bosch-fuel-pressure-control-valve/




And this one has a good (figure 8) illustration: http://www.google.com/url?sa=t&rct=j&q=bosch%20cis%20fuel%20distribution%20unit&source=web&cd=8&cad=rja&ved=0CFMQFjAH&url=http%3A%2F%2Ftech.bentleypublishers.com%2Fserv let%2FJiveServlet%2Fdownload%2F47-29638-292583-4693%2F&ei=5kXPUYu4GYny9gTytIH4AQ&usg=AFQjCNFqyN838dNSNhEh0nQSW_BHTpca2Q&bvm=bv.48572450,d.eWU

TOC
07-02-2013, 04:11 PM
I have had some experience with these types of units, altho not TVR specific by any means.
My first thought would be, that ain't all your problems!
A little more info might help.

Like, was it running just fine, bombing up the hillclimb, and jammed, or is this something you dragged out of 20 years of storage?
If stored, and you have moisture/corrosion issues, be prepared to find a rebuilder.
If it happened in use...and specifically backfired....might just be the plate not centred in the bore and jammed. Look for light around the plate.

I always hated those things..of course, I generally got them when they were brought in with emissions failure issues. And very high miles.
Dave

zgu954
07-15-2013, 08:01 PM
Bosch CIS, yes?

The head can be taken off the distribution unit and with a soaking in mineral spirits it may loosen up the "plunger". My CIS books are locked away in the attic, but the units aren't all that complex.


Not TVR specific but will give you some insight: http://www.google.com/url?sa=t&rct=j&q=bosch%20cis%20fuel%20distribution%20unit&source=web&cd=6&cad=rja&ved=0CEgQFjAF&url=http%3A%2F%2Fwww.porsche928forums.com%2Fdownlo ad%2Fmanuals%2FCISRebuild.pdf&ei=5kXPUYu4GYny9gTytIH4AQ&usg=AFQjCNH3_E6K45yVbwQZFzmGM45tqp8hBg&bvm=bv.48572450,d.eWU


Be aware of the O-ring advice after you get the plunger out. And report back here if this helps, please?

Thanks for the manual. It is very helpful. I look forward to getting the 280i back on the road.

zgu954
07-15-2013, 08:02 PM
Thanks so much for the manual. It is very helpful. I look forward to getting my TVR back on the road. Regards, Leonard