1989_Sil40

hey every body, my car i swear has a 3,000 rpm Revlimit lol. its kinda funny, i think it has to do w/ my AFM. i cant go over 55mph or it will chug and kick. on my SR harness what wires are what on the MAF...

what color is 12V, Ground, and Signal. i am going to resort to trial and error lol :~)

1st : 7mph
2nd : 15mph
3rd : 25mph
4th : 37mph
5th : 55mph

i feel like a semi truch driver having to shift so close.

this isnt something i couldnt take to a shop is it? and let them sort it out.
or can i?

 

kaptainkrollio

It's a problem with the MAF. If it's unplugged or something, it won't let you rev above 2500~3000 rpms. Beyond that, I have no idea. Sorry.

Dustin

a lot of people are having the same problem all of a sudden..its weird, mine runs fine though. maybe its all of the pollen.

__________________
95 Volkswagen Golf Sport - Low, slow, and loud purchased 4/5/08
93 Nissan Sentra SE 2 door - sold 4/5/08
88 Honda Civic DX Hatchback - sold 9/26/07
85 BMW 325e Coupe w/ 88 I motor swap - sold 2/24/07
93 Sentra XE 4 door - wrecked 7/29/06 totalled.
90 240SX Fastback - sold 7/15/05

1989_Sil40

yeah i just get her on the road and she isnt 100% but im surprized that it even moves! i put this car together in 3 weeks, and it can drive 55mph, not to bad tor a first timer i would say. would i just want to try different wire combo's and see if it works? its not like it could get any worse lol

240sxs1377

Just think you saving tons of gas.

__________________
My Rides=
93 240sx coupe mods=none hope to make Ka-t soon
Slammed 83 s-10
88 Ford Ranger 4x4 (for sale)
"The person that said that the pen is mightyer then the sword hasn't seen automatic weapons."
Mess with the best and die like the rest!

 

1989_Sil40

ok i just ditched my RB25 MAF :~( i got a new SOHC MAF from a 89 240sx, now according to my SR20 SWAP Info Center (replacement parts that work on the SR20 here in the USA) it states that the sohc maf will be a direct replacement on the sr20det's is that correct? i also saw some one post something about needing your ECU reprogramed to run a 240sx maf! is that a bunch of horse hocky? or do i really need to do that?

kaptainkrollio

You don't need any ECU work done, but I think you need to rewire the MAF so that the plug fits. www.sr20swap.com should have the right info.

1989_Sil40

the link is a dead link man :~( could u check it and see if that is the actual URL address for it? thanks

~nathan

kaptainkrollio

Maybe is was srwap.com. Either way, it's the Heavy Throttle site: www.heavythrottle.com

Guru

Check your TPS sensor. Really easy. Just check the middle wire on the connector with a voltmeter . Should go from 0.6 or so to 4.XX volts.

 

1989_Sil40

ok i pulled my TPS plug off and tested it like this...

i put the Neg post of the Volt-meter onto the neg terminal, then i touched the positive post to the center port on the TPS plug... here are my results

Car off: 0.00V
Car in ON position but not started: 0.00V
Car ideling: 1.00V
Car Reving up slowly: 4.59V (b4 the car stalled)


do theese look normal? i have never tested a TPS b4

~nathan

zellx2004

yeah, that sounds normal to me. It's definitely your MAF

__________________
LAST Chance! 89 240sx for sale. S13 conversion 2 sr20's needs some work in order to run. 1000 USD. email for pictures.

nismoslut

my freind is also having a weird problem.. his car runs great till 3ooo revs with the mafs unplugged , then you plug it in , it acts like a killswitch and it dies..? bad mafs?

1989_Sil40

ok well i just got back from the car show i was going to... my car didnt make it. i think i fried the Ignightor chip b4 i left on thursday. it will roll over but not start. so im just going to replace my TPS, Ignightor chip and such and see if that is the problem.