Author Topic: timing troubles with tdi-m (Read 4504 times)

norm53 · « **on:** April 12, 2007, 09:15:58 am »

I've got a 97 tdi 1.9 with a mechanical pump from a 86 td jetta. I set the timing @1mm of lift at tdc. I couldn't get it to fire at all. I rechecked the valve timing, pump timing, fuel delivery, and everything else I could think of. I finally tryed advancing the timing and got it to run well @2 mm lift at tdc. I'm thinking that the direct injection injectors open at a higher pressure than the 86 indirect injectors so they open later in the stroke - therefore retarding the injection. Have any of you who have made the conversion to mechanical pumps experienced this? How do I time the pump and what degree do I time it too? It seems like a crap shoot and I'd rather not have any holes in the top of my pistons!! Thanks! Norm

Tintin · « **Reply #1 on:** April 12, 2007, 11:26:52 am »

Humm, y do not have a great deal to make with a 1.6 pump on a TDI engine, keep the timing at 2mm and drive with, nothing other to make....

Probably 40-50HP maximum.

That takes anything other that a specific DI pump for these engines.

I have some mechanical 10mm pump in stock adapted for the TDI, good for daily driving and good for 130-140HP.

jtanguay · « **Reply #2 on:** April 12, 2007, 03:52:29 pm »

Quote from: "Named Tintin"

Humm, y do not have a great deal to make with a 1.6 pump on a TDI engine, keep the timing at 2mm and drive with, nothing other to make....

Probably 40-50HP maximum.

That takes anything other that a specific DI pump for these engines.

I have some mechanical 10mm pump in stock adapted for the TDI, good for daily driving and good for 130-140HP.

how much do you sell your pumps for ?

lord_verminaard · « **Reply #3 on:** April 16, 2007, 08:19:53 am »

Yeah, Ditto!

-Brendan

hillfolk'r · « **Reply #4 on:** July 03, 2007, 08:41:36 pm »

like i said before ,,set it up with a 12mm head,then you got plenty of fuel
kevin@r+r engine can do ya right for like 400 if you have the pump,and 12mm head from a cummins ve pump
800-722-2000

scopefrfd · « **Reply #5 on:** July 06, 2007, 04:32:22 pm »

I'm really surprised that it takes 2.mm of static timing to get it running....I think the pump head you have is worn out. Overland used to sell a M-tdi kit for vanagons that used the 9mm pump head and they ran fine not huge hp #'s but it did produce what a stock tdi does. Remember a tdi only has a 10mm pump head, except auto's 11mm. I have an 11mm pump head on my M-tdi and @ 1.00mm pump timing it sounds as loud as a Cummings. I could get away with .80'sish mm timing if I wanted to quite it down.

You're probably going to need a new pump head soon so might as well get an 11mm or 12mm pump if you can.

GermanAutoMan · « **Reply #6 on:** July 21, 2007, 02:46:48 pm »

Quote from: "norm53"

I've got a 97 tdi 1.9 with a mechanical pump from a 86 td jetta. I set the timing @1mm of lift at tdc. I couldn't get it to fire at all. I rechecked the valve timing, pump timing, fuel delivery, and everything else I could think of. I finally tryed advancing the timing and got it to run well @2 mm lift at tdc. I'm thinking that the direct injection injectors open at a higher pressure than the 86 indirect injectors so they open later in the stroke - therefore retarding the injection. Have any of you who have made the conversion to mechanical pumps experienced this? How do I time the pump and what degree do I time it too? It seems like a crap shoot and I'd rather not have any holes in the top of my pistons!! Thanks! Norm

so how did you fix your car. I think i'm having the same problem

hillfolk'r · « **Reply #7 on:** July 23, 2007, 08:50:29 pm »

i set mine to stock 1.6td specs.....
i started at .7 and worked my way up
at .7 it was horrible
i think its at .99-1.01 or so right now
somethins wierd with your pump
we even set therabbittrees pump to that spec+it was fine
after he removed that wierd head with the spring thing under the plunger,,cause it "wouldnt time right at all"