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Engine Specific Info and Questions => IDI Engine => Topic started by: Soot Sandwich on March 23, 2010, 07:45:12 am

Title: Questions about my diesel
Post by: Soot Sandwich on March 23, 2010, 07:45:12 am

Hey everyone, after waiting weeks to finally register with this site, here I am!  I purchased a 1985 1.6L IDI NA Diesel Jetta Coupe.  I love it.

Upgraded the injection pump to a Giles Performance Pump, replaced timing belt, new tensioner, all new vbelts, new glow plugs and she is runnin' right.  I didn't do any tuning with the max fuel screw or the idle.  The car idles at 1100 RPMs (I know this because I have a proper vw diesel tach), is this too high?  Should I adjust down?  If I do adjust should I do it while the car is running?

Also, the max fuel screw, since the Giles Pump I haven't really experienced anymore power.  Flooring first gear one time I had a huge cloud of smoke.  Could my max fuel screw be up to high?  Would this decrease performance? Should  I adjust for less fuel?  What is the best way to tune?

Thoughts from the group would be awesome! ;D

(http://photos-b.ak.fbcdn.net/hphotos-ak-snc3/hs395.snc3/24027_10100240650720914_9351696_66959031_6574838_n.jpg)

Title: Re: Questions about my diesel
Post by: Smokey Eddy on March 23, 2010, 09:18:27 am

There is no harm in turning the idle screw down while the car is running.
you could also achieve the same effect by turning the fuel screw out as well.
I'm not a NA guy so i have no idea how anyone is expected to make even semi-decent power/efficiency with lots of fueling on an NA without the presence of Oxygen. Either turbo, NOS or ... i dunno some fancy sort of ram-air-cowel... hood scoop... intake apparatus.

Title: Re: Questions about my diesel
Post by: MJF on March 23, 2010, 09:31:30 am

Quote from: Smokey Eddy on March 23, 2010, 09:18:27 am

I'm not a NA guy so i have no idea how anyone is expected to make even semi-decent power/efficiency with lots of fueling on an NA without the presence of Oxygen. Either turbo, NOS or ... i dunno some fancy sort of ram-air-cowel... hood scoop... intake apparatus.

I installed a built pump to my 1,9 NA and it is already faster than my ex ´96 Passat 1Z TDI ;D Yep, it smokes like h*ll, leaves black stripe to snow... Still otherwise stock, but not for long...

Title: Re: Questions about my diesel
Post by: Vincent Waldon on March 23, 2010, 09:32:51 am

When you installed the pump what timing value did you set it to?

Title: Re: Questions about my diesel
Post by: Soot Sandwich on March 23, 2010, 09:45:39 am

I think about 0.96mm.  The spec for setting it was 0.95mm iirc.

Title: Re: Questions about my diesel
Post by: Soot Sandwich on March 24, 2010, 10:09:34 am

Ok well, I will ask more questions: Is it bad to have the temp gauge this high?  It runs fine but, the light is blinking.

(http://i39.tinypic.com/3128etj.jpg)

Title: Re: Questions about my diesel
Post by: jseeley on March 24, 2010, 10:41:30 am

the blinking light should indicate low coolant; temp seems at just about 1/2 way which is normal. 1100 rpm is high for idle, but i don't even have a tach...  :P

as mentioned you can adjust the idle stop while its running, no harm.

Title: Re: Questions about my diesel
Post by: Soot Sandwich on March 24, 2010, 10:52:45 am

Yeahup coolant is topped off, belt is tensioned, not sure if it could be a temp sensor? 

Title: Re: Questions about my diesel
Post by: GEE-BEE on March 25, 2010, 08:56:45 am

Replace all your sensors at the same time , My fan switch finally went bad, stock 81

I installed all new cables, while i was doing the speedo cable, I replaced the instrument bulbs ( lamp )

GB