Please help!!!!!!!!!

kcturbo · 09-23-2001, 09:00 PM

Ok, here it is guys. Bought a K27 from Windward Perf. and a Autothority Mass Air kit. Installed ran realy good then popped the head gasket. Replaced head gasket with a wide fire from Paragon. Now the car does not have any power and a slight miss at idle but seems to go away above 1600 rpm. Checked everything I can think of, Im running out of options. No reading back from O2 sensor will that realy make the car run that bad? I mean it wont even pull itself out of the garage.

Ive checked all kinds of stuff on the car to include, the rpm sensor, ref-mark sensor, idol acctuator, temperature sensor in the block. Hell just about everything you can check with a meter or an Oscope.6

[This message has been edited by kcturbo (edited 09-23-2001).]

Lawrence Coppari · 09-24-2001, 03:08 AM

Mine began running rough at idle a year after I installed the K-27 and MAF. Problem was a bad connection right at the MAF where the harnesses plug together. Cleaned contacts and taped it up so weather could no longer get at it. That was 4 years ago.

Every year at maintenance time I pull harnesses apart and spray contact cleaner on prongs and mating parts of plugs. Then I retape.

Quite a coincidence this happened along with head gasket. You might do a compression check.

Don't know if this will help but good luck.

kcturbo · 09-24-2001, 06:43 PM

Pulled all the plugs today and the #2&3 were toast. There was so much raw fuel in the cyls that you could see it setting in the piston reliefs. Did some more checking and seen the injector pulse has some noise in the signal after the pulse. Looks like Im getting way to much fuel from that cause everything else checks out. The signal from the ref-mark sensor is also quite noisy. What do you all think. What is the square wave from the dme to the klr suppose to look like? This one is not a true square, it has a peak at the end of the signal where the wave should drop off.

kcturbo · 09-25-2001, 07:40 PM

Does anyone have any input? Whats the scoop? Only one reply. Needless to say thats a little diapointing.

Richard Foy · 09-26-2001, 04:26 AM

I also have a scope, but you are finding what I did, and that most people here know a lot about the mechanical parts, but not many the DME part..and those that do don't have scopes anymore. (I got one again on ebay)
I don't remember the pulses going to the injectors were all that clean....my car is down right now, or I'd do some comparisons for you....

kcturbo · 09-27-2001, 07:06 PM

Thanks for the answer. I was starting to think I was a leper or somthin. What kind of scope did you get? The one Ive got is a Fluke mod 97 scope/meter, its awesome. I got the bracket and used sensors for 75 bucks. Thats all three rpm,ref, and the one stamped ot. Hope thats it.

T86951 · 09-27-2001, 08:46 PM

your not a leaper, nobody knows the answer I would say. I don't and I have a NA944 and a 951. I am having a rich clod start problem with my NA 944 but nobody know what it is. The DME fuel air problems are hard to sort out. good luck

Britwrench · 09-29-2001, 02:24 PM

If you are having a rich cold start problem, that is the engine runs rough for a few seconds then clears and runs smoothly, try changing the DME coolant sensor. Once it's warm check the O2 sensor operation and make sure the intake manifold gaskets haven't been sucked in so there is an air leak.