DrifterJ

Well I found a 24 hr. AutoZone, figured I'd change my plugs and wires since my car has a rough idle and poor acceleration (it feels like a dead cylinder). Bad idle, vibration through out.
Fuel system should, *SHOULD* be ok since I had the fuel pump replaced, IACV has been replaced over the summer of last year. So leaves me to believe a vacuum issue or plugs and wires. May be an injector or MAF sensor.

Im not throwing a CEL but I decided to use the jumper wire method since I dont have an OBD1 scanner. No CEL still. I knew i was on the right track because the trans diag. was blinking, but no issues there.

Is there somthing im missing? AC off, throttle closed, radio off...Im baffled

DrifterJ

I should probably note that I own a 92 ls400...

cgawelko

24 hour autozone means you went to 43rd ave and Cactus. your in my neck of the woods.

how are your coils and ignitors?

DrifterJ

Lol, yeah i am cgawelko. Im at 27th and Yorkshire, right behing AMC 30 and Target and such.

I have yet to check the coils and ignitor.

Not sure how to, to be honest.

cgawelko

im down by Glendale 9, but im out that way all the time. work over at Mill though....

This post is from LSCowboy on another persons thread, and it shows step by step how to check them on a LS400 specifically. Skip toward the end, the beginning part is just a bunch of talking :P

DrifterJ

Right on dude, we should meet up soon. I'd love to meet a fellow lexus owner.

Im still new to these cars.

cgawelko

I am too new as well, only had mine about a month. sometimes I go out to the street racing gatherings and such, but lots of rice hangin around there and Lexii loves rice lol

DrifterJ

Hahaha, ok cool. I've gone through my street race phase, found out its childish lol.

anywho, i just watched the link you posted. helpful, im gonna have to try that this weekend. see if my buddy will let me borrow his volt meter and grab a test light.

cgawelko

volt meter and test light wont be more than $15 for the two at Autozone. should be $7.99 for the volt meter and $3.99 for the test light. Aisle 2, right side, right at the front of the aisle.

DrifterJ

Thanks for the help buddy, and the quick response. It's my daily so i need next to no down time. Full time student, and going to be starting work soon in tempe.

cgawelko

so you will be working on my side too! and no problem, its what I do. Im currently at work and this is what I get to do on my spare time lol

Gene01

For this work (and most automotive testing), you can use the cheapest digital voltmeter you can buy.
Harbor Freight frequently has them on sale for $2.99 or even free on occasion.
Then, you don't mind so much when the batteries leak after leaving them in the hot trunk for three years :-)
I actually prefer the old style VOM which don't require batteries unless you need to measure resistance (ohms).

DrifterJ

Thanks Gene01, I'll go and see whats out there, every tool box does need a volt meter lol. I used to have one, but a friend of mine used it more than i did, so i gifted it to him.

DrifterJ

Yeah, man, Direct Energy is on University and 52nd street, we're not going to be too far lol

cgawelko

Im at Scottsdale and Weber lol. so literally 4.2 miles away. ill probably see you on the freeway if you work late at night because I go to work around 1030. You will know, its the lexus with yellow middle lights and then regular headlights, usually in the HOV going a touch over the speed limit