ok my buddy. .. has a 1994 mb. mods are.. greddy intake, apexi n1 exhaust, not sure on dp but not stock. and hks grounding wires, and turbo xs mb times 2.

the problem is that it feels like he has no boost. the werid thing is the gauge is showing he has boost. we did the "damian" mbc setup, and got his boost dialed in almost perfect.. we got it to 10-7-10. im curious. cuz when we got it dialed we did a 30 mph roll on. and after second gear i started pulling on him really hard, and i only have a hks rs intake??!! he said it felt like mine pulled alot harder then his did..i was thinking maybe less backpressure would mean more power and better flow..but mine and his feel totally different..im worried because im getting hks dp and hks hiper exhaust here in a couple months....lol. we have a lot of theorys and speculations but nothing solid to start troubleshooting with, and more heads r better then two . i was just counting on a more 'experienced' opinion on where we could start troubleshooting...thanx in advance..

-steve

 

Could be any number of things. You need to make sure that he is indeed making boost, and at the levels you saw before anything else. What are his vacuum levels at idling at 750 rpm? How many miles on his engine? Could he be experiencing ignition breakup at higher rpm? Etc. etc.

 

will look at that tomorrow...we r in the navy and he is in alaska and gets back saturday..so we will check that...he got the grounding kit becasue he was having werid idle problems and that fixed it...he also changed his spark plugs and wires...so...but will get numbers for u tomrrow..

 

ok...checked with my buddy, the vacuum at idel is at 12...IIRC, i thought it was supposed to be 20. what steps can we take to fix this...ot what would cause a low vacuum?

 

Plain and simple low vaccum a weak pulling motor or some serious porting if hes got stock ports his motor is def. worn.....If hes not making good power but making the claimed boost thats another sign that his motor has took a turn for the weak side. Do a compression test!

 

k...will check the compression this weekend. man he just got the car running after like 3wks of waiting...lol. he has 86k...i do blieve..oh well...time to once again learn the ways of the beast... thanx for your help will post results prop fri..