cali108

iTrader: (1)

My car is acting up, to the point that I really cant drive it.

I've searched for hours. Here's the problem, I start it.

wont rev past 3-4krpm
Idles High 12-1500.
CEL Light on
TRAC Light on

tried to pull codes, but all I get is a solid CEL
So I reset ECU (disconnect Neg terminal) 10-15mins (Still the same solid CEL)

Driving it~ always starts in 3rd gear. in order to take off I have to manually put it in 1st or low and shift up. and overdrive is not engaging. very slow acceleration to the point that it is dangerous,
Horrible gas mileage 8-10mpg

Its sounds like an electrical problem I believe...
things I did ALREADY

Unplugged my MAF and no difference at all!
Checked each coil and when unplugged each one separately, both sides stumbled & ran differently
Also Cleaned the IAC

So I'm Guessing its maybe

MAF?
TPS?
ECU?

here's a video of part of the problem..

and it wont rev much higher than that~
this first started happening a month or 2 ago,
Its like its in Limp Mode. overdrive not engaging & A/C compressor not kicking on, both worked flawlessly when its ran perfectly
awhile back it would do this then sputter and be back to running awsome!

now its just stuck like this plus a lot of electronics are not working like A/C etc...

Any ideas or help would be appricated

SC400slide

iTrader: (11)

Your vid link isn't working...


If the MAF does nothing to the idle when disconnected, I'd cite that to replace. Have you cleaned the MAF recently?

durps

iTrader: (8)

https://www.clublexus.com/forums/sho...d.php?t=551125. Try these.

cali108

iTrader: (1)

I took the MAF out looked at it blew it a little... put it back it was the same.. you not suppose to spay anything on it but compressed air right?

SC400slide

iTrader: (11)

Vid doesn't work for me... Read that thread durps mentioned.
Ya, if the MAF is Karmen vortex type then all you can do is blow it w air. Btw the MAF is an AFM in your case since your car us pre 1995

cali108

iTrader: (1)

good thread, don't know where to start

cali108

iTrader: (1)

Ok Im guessing it will say it on AFM

I uploaded the video to youtube should work now

SexCoupe

iTrader: (6)

first thing i would check is throttle and transmission cables...seems like a ecu problem...maf wouldnt make it start in third gear, neither would TPS,

Vrank

iTrader: (4)

Your ecu is bad. Before it was going bad. Now it's completely bad.

Vrank

iTrader: (4)

Seriously pull it out and pop it open. You can try getting a q tip lightly wet with isopropyl alcohol and swabbing away capacitor gunk, maybe blow it dry quickly with a keyboard duster. This can help sometimes. Others you have to completely replace the caps for the ecu to return, if it's real bad and has burnt the board you can possibly bypass the burnt spot with a wire. Or get a junkyard ecu and give that a go.

cali108

iTrader: (1)

I think I have agree with you guys... ecu I will check it out as soon as I get a chance,

are the ecu's off ebay any good? found a few just over 100.. and what years work 92-94?

SexCoupe

iTrader: (6)

yes 92-94 let us know how it goes

cali108

iTrader: (1)

It looks good ...

cali108

iTrader: (1)

Can there still be something wrong with the ECU? even though there no physical damage?

I tried to start it up yesterday with out any luck, so it doesn't start, I pulled a plug, and no spark...

then 5 minutes later it barley started, just like the video.. wtf still cant drive it... 7 weeks~

SC400slide

iTrader: (11)

That ECU looks brand new on the inside. Look closely for any leaking capacitors on your original ECU. Is that what you mean by "physical damage?"