Jim Devine

Might be worth a trip to the dyno. Not for any power pulls, but loaded on a dyno with a probe
in the exhaust & the ignition hooked up to a scope
would tell you a lot.

michael j wright

Mine did something simular, turned out the wur was pluged. You really need to put the gauges on it to check your preasures before you do anything else.
Mike

gbgastowers

I am changing out the injectors tonight and I'll also pull the plugs and clean them. I will post pictures of the plugs before I clean them. After I get it back together I will finally put these gauges on it.

Hilton

This may help - along with the WSM instructions on measuring pressures.

http://www.cannell.co.uk/Bosch_Techn...K-Jetronic.pdf

gbgastowers

Thanks for the help guys. I have high hopes after this work session is complete. Changed the injectors and pulled the plugs for diagnosis. I think #6 needs a new plug or plug wire cause it still looks new indicating no spark here or no fuel? #1,2,3,4 and #5,6,7,8

Mongo

What's going on with number one? I am seeing what looks like oil deposits there. Number 6 does not even look plugged in. I would vote on a wire or one of the wire connectors on it. You might as well replace all the ignition wires if they have not been done. Number 8 looks way too rich.

gbgastowers

Maybe uneven flow from the old injectors might explain the different conditions of the plugs?

Mongo

Are those the original injectors you are still running? Also you had mentioned the car is CIS. Did you do anything with the air sensor plate? According to my CIS book I am looking at, you either have a fuel pressure issue or air sensor plate issue in addition to those ignition wires.

gbgastowers

Replacement MB 047 from ebay are in as of tonight. I will check the fuel pressures. Air sensor plate works good. Thanks

Mongo

Good luck! Let us know the results!

dogleg

cant see how it could be a wire explaining no 6 as you have voted,has to be no fuel to that cylinder,it would be wet if it had no spark!MY MONEYS ON THE INJECTORS CAUSING THIS!! no harm for him to do an ohm check on the ht leads and replace all if any are reading wrong.

dogleg

300 bhp coming up if you sort this!its probably running a 100 at present

Mongo

I wouldn't be surprised if it really could be the injectors. The fact that the number 6 appears as it is makes it look like the wire was either not seated on the plug or a dead wire/connectors.

Rich9928p

I had a low power problem with my '79 Euro 928 track car (has CIS fuel injection). It wouldn't run much over 2500 RPM and would sputter. I replaced all the fuel injectors, it made no difference. I replaced the WUR. I checked the pressure with gauges. I finally swapped it out the CIS fuel distributor with a different one and all was well. The CIS Fuel distributor was clogged. I tried taking it apart and cleaning it/replacing all the rubber bits but that didn't fix it. I had it rebuilt and it ran well after that.

Eliminate the spark and cam timing issues first. If you can borrow a CIS fuel distributor and try the swap, that will be the best way to determine if that is your problem. I can recommend a great rebuilder.

dogleg

gbgastowers did the car run right when you first completed the ring job ?did you do that job yourself?