You should meet up with your friend and try swapping MAFs, sounds like something that happened on my old 300ZX, except it got worse and worse then wouldn't run at all, ended up being my MAF

 

Nah... The vac leaks didnt do much. I sprayed the area with carb cleaner and didnt make a difference. I swapped my Fuel pump ECU since i've heard of a few cases where its an issue, but didnt change squat. On the brightside, I did get a chance to re-run my speaker wires since my back seats were out.

I'd love to take you up on the offer, but its a decent drive down there.

 

Thats actually one of my next guesses. I've disconnected the MAF and the car runs worse w/o it. I understood that it should run like normal w/o the MAF but with a crappy idle. Im just going to check the resistance on in tomorrow and see what i come up with.

 

Heh I have another maf you can test it with lol. I also have 2 extra coils and extra 1 uz connectors and fuel injectors. Extra parts that i got for free ,but my 1uzsupra doesn't run yet lol. Well if you want to drive down on a weekend or whatever me and my buddy REDPHOENIX would help you out. I like keeping the SC's on the road. Brothers car is almost ready to drive waiting on parts from a CL member.

 

well, i tested the MAF/IAT and the resistance is a little odd. at 68F it should be 2-3k ohms, im getting 1.5-1.8. at 176F its supposed to read 0.4-0.7k ohms. when I heated the MAF with a hairdryer it read 0.6-0.7k.

Does it really matter if im at 1.5k ohms instead of 2-3k ohms?

i also tested the TPS from the test connector and its supposed to go from 0-8.0 volts when the gas is pressed. im getting 1.07 volts instead of 0, is this close enough?

 

well, it gets better.... Seeing that my MAF was reading slightly lower resistance 1.5-1.8k instead of 2-3k ohms, I decided to try and clean it.

The studder from 1k-2k RPMs is gone! Although now i've got a check engine light. I havent pulled the codes, but the last time I cleaned the MAF it took 2days to clear the code. Might just have to buy another MAF, since it seems to be the culprit.

 

Sick man sick get rid of that garbage maf.lol

 

man.. time to look for one. I thought i'd pick one up from advanced auto or autozone, but they are out of stock. Damn.. they were cheap too.

keep an eye on the mail... i sent that cd clip yesterday.

 

just got done installing 8 new NGK V-Powers plugs and new omnispark cables and it fixed my 92 sc400's sputter around 45mph. thanks