KA24DET custom topmount, wont run. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

wsmiteh · 06-26-2015, 06:27 AM

Hey guys, not sure if I have ever introduced myself, but my name is Will, and I "drive" a 97 Kouki S14, with a custom topmount Ka-T. Setup is your pretty standard 255, 550cc's, Rs-Enthalpy Tune, z32 maf, etc.
Tried to start it the day before yesterday, and managed to get it fired up. Initially, had some bad vac leaks, and the wastegate stuck open, both of which I chased around and fixed, and car would idle properly, albeit pretty rich, but not rev well. Back at it again yesterday, car would start up, and more of the same. Changed the plugs, and ball-parked the timing off a friends ka (as I don't have a timing gun... was planning on borrowing a friends today), and had it at a point where it would idle well, and rev (relatively) smoothly to 5-6k rpm but with a misfire, and would drop low, and stall, on the way down from high rev's (wouldn't "catch" itself). At that point afr's under wot were around 12-13. From there, changed/gapped the plugs again, and tried to rewire the maf thinking it could be a bad connection or something. Car then idled like shit, and went back to not revving above 2200 rpm. Rewired the maf AGAIN, and it then would idle properly, but still wouldn't rev, over 2500 or so. Went to start it up again after checking the timing (but not touching or changing anything at all) and the car will not start. There is no spark at the plugs now, checked a brand new plug, still no spark. Swapped wires, still no spark. Anyways, I'm pretty stumped, and at wits end, if anyone has some insight into what the issue is please let me know! Comment with any questions about this shitbox and I'll try and explain all best I can.

w0nderbr3ad · 06-26-2015, 08:42 AM

I think your maf should be further away from the turbo and wouldn't hurt to spray it with some maf cleaner.

wsmiteh · 06-26-2015, 08:55 AM

Yea I was told that on another forum I posted on as well. Going to grab some piping and couplers this afternoon. The maf is brand new out of the box though so shouldn't need to be cleaned.

***FaLKoN240*** · 06-26-2015, 07:40 PM

...brand new maf.

What brand? If it's ISIS throw it in the trash. I washed two of my rings away and had to build a new motor after an ISIS MAF made my car run extra rich.

You're better off with a used maf than an ISIS maf.

9d6silvia · 02-05-2016, 01:43 PM

I posted a thread on the same issue with the car not catching decel idle. think you could check it out?

wsmiteh · 02-05-2016, 08:44 PM

Yea for sure, I ended up swapping to a standalone and map and it solved all of my problems. Best decision I ever made lol. Coilpacks conversion is going on now and its so easy.

9d6silvia · 02-05-2016, 09:47 PM

Quote:

Originally Posted by wsmiteh

Yea for sure, I ended up swapping to a standalone and map and it solved all of my problems. Best decision I ever made lol. Coilpacks conversion is going on now and its so easy.

Is there a thread on a map swap and stand alone like aem fuel management ?

06-26-2015, 07:40 PM	#4
*FaLKoN240* Super Moderator Join Date: Jun 2004 Location: SoCal Temecula Posts: 16,885 Trader Rating: (73) Feedback Score: 73 reviews	...brand new maf. What brand? If it's ISIS throw it in the trash. I washed two of my rings away and had to build a new motor after an ISIS MAF made my car run extra rich. You're better off with a used maf than an ISIS maf. __________________ Best way to do business with me? Make your best offer FIRST.

06-26-2015, 08:42 AM	#2
w0nderbr3ad Zilvia FREAK! Join Date: Feb 2004 Location: Vantucky Posts: 1,294 Trader Rating: (50) Feedback Score: 50 reviews	I think your maf should be further away from the turbo and wouldn't hurt to spray it with some maf cleaner.

06-26-2015, 08:55 AM	#3
wsmiteh Leaky Injector Join Date: May 2013 Location: Calgary, Alberta Posts: 74 Trader Rating: (1) Feedback Score: 1 reviews	Yea I was told that on another forum I posted on as well. Going to grab some piping and couplers this afternoon. The maf is brand new out of the box though so shouldn't need to be cleaned.

02-05-2016, 01:43 PM	#5
9d6silvia Join Date: Jan 2016 Location: north carolina Age: 28 Posts: 13 Trader Rating: (0) Feedback Score: 0 reviews	I posted a thread on the same issue with the car not catching decel idle. think you could check it out?

02-05-2016, 08:44 PM	#6
wsmiteh Leaky Injector Join Date: May 2013 Location: Calgary, Alberta Posts: 74 Trader Rating: (1) Feedback Score: 1 reviews	Yea for sure, I ended up swapping to a standalone and map and it solved all of my problems. Best decision I ever made lol. Coilpacks conversion is going on now and its so easy.