|
|
|
|
| Author |
|
|
Registered
Join Date: Dec 2001
Posts: 132
|
3MM wrench
1981 911SC
got all the required stuff (tester) to adjust my CIS mixture. Got the 3MM key. Problem is.....when I put the 3MM in the spot to drop it into the adjuster hole I can't seem to get it in the right place to catch and make the adjustment. Can't even see in the area. Any comments or suggestions? Who designed this system? hahaha! Tx. john |
||
02-09-2003, 07:23 PM
|
|
|
You do not have permissi
Join Date: Aug 2001
Location: midwest
Posts: 39,997
|
The screw is in the little hole on the flat area between the rubber sensor plate boot and the fuel plunger part(with the ring of hoses coming out of it). I sprayed a little WD-40 very carefully in there but it is not good for rubber.
Use very light pressure and just the fingertips and rotate it to fit it in. That is a delicate area and the hole may have a cap or be filled with dirt (hope not-CIS does not like dirt or vacuum leaks). Right is richen, keep engine off when adjusting, don't push when turning, and turn no more than an 1/16 th at a time, start, rev up and recheck, take the tool out inbetween or you'll bend something and buy a new distributor. The mixture is pretty sensitive so go easy, good luck I think Bosche owns the patents on CIS and the D and L jet/motronic (on all the modern cars). I think Chevy used a version of the CIS on some years of the corvette to get around royalties. Last edited by john70t; 02-09-2003 at 11:13 PM.. |
||
|
02-09-2003, 11:09 PM
|
|
|
Registered
Join Date: Dec 2001
Posts: 132
|
if there is dirt or a cap on the 3MM hol HOW do I see in there to clean or whatever??????
|
||
|
02-10-2003, 05:40 AM
|
|
|
Registered
Join Date: Jul 2001
Location: Springfield, MO
Posts: 1,422
|
The Rochester Fuel Injection used by Chevrolet, as well as Pontiac and Chrysler, was licensed from Bendix. It was was a type of CIS. I believe that perhaps Bosch also licensed the use/idea of CIS as well as everybody else.
As far as adjustment of the CIS unit, I would try to make sure that everything is very clean. Examine the adjustment hole to make sure that a piece of the rubber plug hasn't broken off and is blocking entry of the hex key. Good luck, David Duffield |
||
|
02-10-2003, 06:01 AM
|
|
|
Registered
Join Date: Dec 2001
Posts: 132
|
how do i inspect???????? can't see in there
|
||
|
02-10-2003, 06:18 AM
|
|
|
Registered
Join Date: Dec 2000
Location: St. Louis, USA
Posts: 129
|
There is no way to inspect in that tiny area. You really have to go by feel. Are you able to get the 3mm to enter the top of the unit? If so then after inserting the tool it's about one to two inches down until you engage the allen head (I'm going from memory). Then it is CW to richen and CCW wise to lean - always finishing in the CW direction. Hope that helps...
__________________
78 3.2L CIS 911SC |
||
|
02-10-2003, 06:52 AM
|
|
|
|
Heck, I’m only 5 not 71!
|
You could use an inspection mirror and a flash light to see in that tight confining area. You could also do a partial drop of the engine to get a better view of the hole to look for blockage. Just make sure you bolt the engine back up before starting.
__________________
Pat Henry Targa80 1980SC Targa (Mocha Brown) |
||
|
02-10-2003, 06:55 AM
|
|
|
Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,491
|
the adjusting screw fills up with dirt, keeping you from inserting the tool. sharpen a length of stiff wire and poke it down the access hole to loosen the dirt. go straight down, not angled. sometimes one of the injector lines needs to be moved, by loosening it's fitting, moving the line, and retightening, so it's out of the way.
__________________
https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
||
|
02-10-2003, 07:21 AM
|
|
