Whats its deal!?!?!

[BLKTOPS14SR]

Ok first here's a list of mods:

JWT Tuned ecuZ32 mafDSM 450ccS14 T28Sheepdog BOVSAFC-IIFMICTanabe exhaustautomatic

Ok, so my brother has a 1989 240 with a CA swap and auto trans. We swapped it roughly 3 years ago. It has never ran right, but decent enough to drive. We've followed every post on wiring and tuning there is from here on nico to australian sites. The car would constantly run rich no matter what we did/do. Recently we took the intake manifold off to see if it had any vacuum leaks. We've taken it off several times with no issues from it. We reassembled everything back and the car won't run correctly at all. Unplug the tps. nothing. unplug the maf nothing. The car runs at idle, but as soon as throttle is applied it falls on its face. The only lead way I've had is unplug the SAFC and the car idles and allows some throttle, but won't rev and stumbles. Our uncle's shop installed a new timing belt last year and thats all good. What the hell is its deal!!!!!

[BLKTOPS14SR]

Thanks for the help guys!

[fabio240]

Thanks for the help guys!

Chill out check the MAF sensor.

[Buddyworm]

What's the ECU tuned for? And why do you need an SAFC if the ECU has been tuned for your MAF and injectors?

Upgraded the fuel pump at all? Is your FPR in good shape? What about timing?

[BLKTOPS14SR]

Sorry about the negativity. Its been really frustrating and its not my car. I put my maf in it and it acted the same. It has a Walbro and Aeromotive FPR. Timing is set dead on and the belt is new. We have the AFC cuz thats what we were told we needed. I'm removing it tomorrow. Thanks for the input guys. I'll keep ya posted.

[BLKTOPS14SR]

New problems!!! Ok so we removed the SAFC check fuel pressure, and the car acted just the same as it has. No difference. Running pig rich won't rev past 1,500rpm. Then it died, like before. But now it won't even start?!?!? So....what is its deal?

Once again, mod list:450cc injectorsZ32 mafT28Headerfull exhaustFMICBOVJWT ecuSAFCWalbroAermotive FPR

Wiring harness was wired according to wiringspecialities specs and maf wiring to JWT's. The maf wiring diagram on here is incorrect and AFC read 100% AF1 when wired that way. Is the CA a cursed engine? Thanks guys.

[BLKTOPS14SR]

Could it be the knock sensor or CAS? It acts/acted like its outta time.

[Buddyworm]

Time to pull codes?

[BLKTOPS14SR]

Oh I forgot that one. LOL The ecu has both green and red lights on with the key on. LOL Never seen that before. Any idea's on that? I know there was a link to an aussie site on here that had the codes, but the link doesn't work.

[fabio240]

Get another ecu that is not chipped and try that. Also check your afc and see if it is set right. Like the ins and out setting for the afc I also have a z32 maf but its supposed to be in 2 and out 7 but mine is in 1 and out 7 also try different injectors you can get some more injectors those might be leaking and try the dropping resistor from a dsm.
Modified by fabio240 at 8:35 AM 6/29/2009

[ca18detgabby]

sounds like a funky ECU.

bad CAS.... car would not run

could be an issue with the maf.

I would re-do ALL of the vac lines.......... checking the BMC as well. Making sure they are all good.

I would try taking the BOV out of the equation as well. could be leaking....

I would would also check my timing....... maybe your tensioner is funked? or it jumped a tooth?

[BLKTOPS14SR]

Thanks for the replies.

The DSM injectors were bench tested before installed. They all checked out.

CAS, the car doesn't run now. LOL I know our aussie connection had issues with the CAS. Left them stranded twice.

MAF, we swapped my Z32 maf off my car to his. Made no difference.

All the vac lines are were replaced when we swapped the injectors in.

AFC, IN/OUT settings we messed with alot. Tried all different settings. Didn't help.

I'm really leaning towards the ECU. His car ran great before he sent his ECU in and has ran stupid rich since and not even 75% good.

Thanks again for the replies! We'll continue to search!!!

[biosehnsucht]

I don't know if this is still the case but JWT used to be notorious for being waaay rich on tunes that were shipped in/out, they'd rather hose down your cylinder walls and cook your cat than chance running lean and being blamed for the ping.

for the CA you don't need no JWT'in, just socket the ECU and flash your own rom, and you can tune it yourself. DSM injectors and Z32 should be straightforward, hell if you had the SAFC anyways you could have used stock ECU and SAFC and it would probably run better than a JWT rom.

Did they do anything to keep you from touching the ECU, or did they just slap a ROM in it ?

[boost_boy]

Ok first here's a list of mods:

JWT Tuned ecuZ32 mafDSM 450ccS14 T28Sheepdog BOVSAFC-IIFMICTanabe exhaustautomatic

Ok, so my brother has a 1989 240 with a CA swap and auto trans. We swapped it roughly 3 years ago. It has never ran right, but decent enough to drive. We've followed every post on wiring and tuning there is from here on nico to australian sites. The car would constantly run rich no matter what we did/do. Recently we took the intake manifold off to see if it had any vacuum leaks. We've taken it off several times with no issues from it. We reassembled everything back and the car won't run correctly at all. Unplug the tps. nothing. unplug the maf nothing. The car runs at idle, but as soon as throttle is applied it falls on its face. The only lead way I've had is unplug the SAFC and the car idles and allows some throttle, but won't rev and stumbles. Our uncle's shop installed a new timing belt last year and thats all good. What the hell is its deal!!!!!

JWT ECU? Problem solved. Been there, done that, that failed, and got scrapped. The JWT ecu is what cost me some set-backs back in the days. Snatch eprom out and put a standard one back in. Get rid of the AFC for now. Put the car back to stock and go from there.

Dee

[bentvalves]

^ and check that your cam splines on the exhaust side arent f*cked. Pull the CAS and inspect VERY closely with flashlight - Both cam splines and CAS splines.

[BLKTOPS14SR]

Thanks for the replies!!! I figured it was the ecu. It hasn't ran right since he got it chipped. Plus his car is auto so I don't know if that means anything. We have a friend with a stock CA swap and we'll see if we can borrow his ecu. Or my brother can buy another one. Thanks again!!!!

[BLKTOPS14SR]

Throttle % is at 100% idling. Give it gas. It drops to 56%. Its backwards! LOL WTF!!!!!!!!!?????????

Small update: My brother sent his ECU to EMance. They got the job done. Before with the JWT Chip you couldn't give any throttle. It would die. With the EMance chip it moves and runs but extremely rich and sluggish. Do you guys run the Z maf wired to JWT specs or to the one on here? Thanks Josh

[Ca_Silvia]

For MAF wiring use what is on here, worked perfectly fine for me.

Check codes now that the ECU has been semi-dealt with.

[BLKTOPS14SR]

Wired the MAF up to the diagram on here. Made 0 difference. It was wired to JWT specs. I've swapped mafs. No change. But like I said, the tps is acting like its backwards. Should be at like 0% throttle at idle, but its saying its 100% when I know it isn't. Where can I get a diagram on what codes to look for and how to tell which on is which. There was a link to boostcrusing but it nolonger works.

[float_6969]

The Factory Service Manual has all of the codes and the meanings. The link is in the stickies.

[BLKTOPS14SR]

Thanks man.

[ard]

a lot of mods, and poor engine management?

when do people learn that plug and play does not always work?

[ca18detgabby]

a lot of mods, and poor engine management?

when do people learn that plug and play does not always work?

right after engine go boom

[jynxtrix]

zerothread?id=270584IT's on this forum! lol. anyway, check it out. And if you are interested, I went thru 3 ecu's when I thought mine was bad, turns out i got hosed on my wiring job by wiring specialties, I'm still pissed about that. anyway, I have a spare automatic ecu if you need one. works fine, just kept throwing a code for a sensor or two that I didn't have since mine is a 5 speed. lmk.J

[BLKTOPS14SR]

Thanks man, i'll let my brother know.

ARD, lots of mods? Just bolt on's and nothing big. Just followed advice on here and other places with so far s***ty results. He went with JWT cause "they're the nissan guys" LOL. ECU was chipped when the injectors, maf and turbo were added. As far as I know and have read on here, the CA's wiring is the same as S13 SR redtops. Basically his car ran good before he sent the ECU to JWT. Boost-Boy and others have since told us that JWT isn't a good tuner.

Once again thanks to those that have helped alot!

[BLKTOPS14SR]

Checked codes:

#12-Mass Airflow. Its wired to spec using the wiring diagram on this site.We have also swapped MAF's with no change.#33-Exhaust Gas Sensor-Currently running a Blacktop S13 sensor according to Enjuku racing wiring specs. There's three wires, what is the correct order they should be in? Signal-ground and return. Which wire is which. Thanks again. Josh

[Ca_Silvia]

CA18det o2 sensor can still be bought at part stores. Screw splicing s*** just buy the right parts

[BLKTOPS14SR]

That would be great if our parts store around here had them. LOL All they have are Bosch Unverisal junk. LOL With three wires two blue and one black. Thanks man!

[s13redmon]

its because it doesn't like being auto jk sorry i'm no help lol

[s13redmon]

actually, you can get the 02 sensor for a ca18et s12 200sx pretty sure the year is either 84 or 86, thats the sensor i got for my ca. they have it at advance or autozone, probably in stock....