Mercedessource Product - A video instruction manual explaining in detail how. Now you can do it yourself at home with our custom bench mount hand pump. (MFI) Tester and Cleaning Kit Universal Bosch Gas Fuel Injector Testing. Trying to figure out why I am experiencing a lean fuel condition under lite loads and throttle tip in.

The link MobileWrks posted is to a page explaining the Bosch CIS system known as K-Jetronic. A rabbit trail you don't need to go down!However, you already had the question posed by this thread answered days ago in your earlier thread. Had you bothered to check!

Grady posted the link to Pelican's MFI page on 30 November 2005!Soak the MFI pump in Berryman's B-12 Chemtool for a few days. It usually frees up without having to do any dissassembly or adjusting at all! After freeing up, let the pump dry out. Then soak in Marvel Mystery Oil. And turn it over a few times every day for a couple of days.You don't need to be messing with internal adjustments to the MFI injection pump! All that will do is guarantee that it has to be sent off to a professional for rebuilding!!! I have read this stuff, theres no real info there, it all runs around the subject but nothing to tell me how the 'pump' actually works, even a couple of the breakdowns leave certain views out, For some reason Porsche is very cryptic anout these models, We did soak it and used 3 different chemicals, it was welded with varnish, had to be taken apart, and we will finish the job, once fe find some info on it.

Thats why you have to send these off to have them 'fixed'. If you had the info, or a better understanding of them, you could save yourself $1000. And they certainly dont want that.

I have read this stuff, theres no real info there, it all runs around the subject but nothing to tell me how the 'pump' actually works, even a couple of the breakdowns leave certain views out, For some reason Porsche is very cryptic anout these models, We did soak it and used 3 different chemicals, it was welded with varnish, had to be taken apart, and we will finish the job, once fe find some info on it. Thats why you have to send these off to have them 'fixed'. If you had the info, or a better understanding of them, you could save yourself $1000. And they certainly dont want that.

I will say this, I will never pay $1000+ to have a pump basically re-adjusted, I will learn how and do it myself, change to carbs, or sell and chaulk it to a little experience. Someone on this forum had to figure them out, has anyone even tried? It would be so beneficial If a person 'cracked' the pump code. Talk about tweeking! My brother uprooted EFI from a 302 early '90s and installed it, and the wiring harness on his '71 Mach 1, 351 cleveland! Purrred like a perverbial kitten!Injectors, mass air, computer.

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To my knowledge theres no manual to show how to do that either.! Lex,I admire your tenacity. However, in the US, only a couple shops like Pacific Fuel Injection (Gus Pfister) or Henry Schmidt at Supertec have the experience, special tools, and the required inventory of used parts to correctly repair MFI pumps. Bosch sold all of the repair equipment and the entire inventory of spares back in the 1980's- ever since then, the pumps are repaired with a dwindling amount of NOS parts and usable spare parts from other pumps. And it was never important to Porsche that the MFI system be cheaply rebuildable- why do you think the 911T came with carburetors?Sure, there is nothing preventing you from taking it apart and trying to get it back together. But knowing how to do that, knowing all of the settings and having all the experience to do it right the first time and not trash the pump or blow your engine, well, it's a long shot.You found the right book, though. As you can see on the first page of the Repair Manual, the instructions have been updated to cover the double-row ('VR6') injection pump, which is called 'PED 6 KL' which I am guessing means, in German, 'Pumpe Einspritzung Doppel-Reihen.'

The single-row pump you see on the cover is probably not familar to you yet, but the MFI gurus here will recognize it as the single-row pump from the early 906E and 910 engines. Porsche used this technology as far back as the early 1960's.So in that manual, you can see all the special tools and wrenches and procedures that must be followed EXACTLY for the pump to work correctly. The rebuilders who have experience with these pumps, and also the facilities to test the injection output per stroke through the pump's 0-4000 RPM speed range, have the ability to do that. I'm not trying to discourage you from doing it, but just making you aware that cracking open that pump is not for amateurs: you do NOT want the thing to fail when the engine is at wide-open throttle under load, or you will be spending a lot more than $1000 to repair the engine!It would be far better for you to look around on Ebay or junk yards for a good working '71 E pump, identified by the ID number ending in -010, the trouble is, you won't save that much over a rebuilt one. Perfect ones, that have been filled with Marvel Mystery oil to preserve them go for around that, so you might not be better off buying used.Conversion to carburetors was a popular thing to do back in the 1980's because so many people didn't understand, or wouldn't take the time to learn, how to properly set up and adjust the MFI system. So you see lots of 2,2 E's running around with Webers, which costs about 10 Horsepower, and doesn't have the same throttle response, not to mention originality, plus you still have to get a set of Webers or PMOs and change the electric fuel pump. These days, with the availability of the kind of information we have on Pelican, a lot of guys are converting BACK to MFI, which is why the stuff is getting expensive.Anyway, good luck with your problem.

If I were in your shoes I would call Henry Schmidt at Supertec and arrange to send your pump to him, you will save money, time and frustration in the long run.