S13 KA-T Problems :( HELP PLEASE - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ariansarvi · 08-16-2014, 03:23 PM

Hey everyone, new here and wanted to see if anyone could possibly help me with my problems.

Specs:
- 92' 240sx KA-T
- T3/T4 Turbo
- 3 inch exhaust
- Stock ECU
- FMIC
- Prob around 300hp

1st problem: this is recent and not every single time, I'm driving and at slow speeds it just turns off, then it doesn't turn on but cranks for like 30 seconds then turns on again. Note: my dad took it for a drive and he didn't know and put 89 octance. I'm thinking it's a fuel problem, maybe not getting fuel. Please help.

2nd Probelm: When I'm coming to a stop or just slowing down and I put it in neutral, the car does, only in neutral this happens, what I tend to do is right when I ear it's about to die I throw it in first or second then the rpm goes back up.

3rd Problem: I have a boost gauge and A/F ratio guage. The boost gauge seeks fine, the A/F plays a little too much I think, it's not really steady at idle it's around 14-14.3. When I drive sometime it goes crazy and goes all over the place. Also side note, what is "Peak" for my boost gauge and A/f ratio there's a button that turns on "peak" what is it? And should it always be on?

Croustibat · 08-17-2014, 11:31 AM

Your problems:
1/boost leak
2/maxed MAF and/or injectors, maybe dying fuel pump
3/no tune

Fix 1 & 2, then have someone fix #3 for you. Do it before it is too late, if it is not already.

ariansarvi · 08-17-2014, 01:40 PM

Quote:

Originally Posted by Croustibat

Your problems:
1/boost leak
2/maxed MAF and/or injectors, maybe dying fuel pump
3/no tune

Fix 1 & 2, then have someone fix #3 for you. Do it before it is too late, if it is not already.

Thanks for the information, it is very much appreciated.
So putting into consideration the specs of my car I have listed above, what size / brand injectors do you recommend. Also MAF and fuel pump, what is good to buy?

Frank_Jaeger · 08-17-2014, 02:16 PM

Get some 720cc injectors, any brand. Get an OEM Z32 MAF. Walboro 255 is commonly used in turbo setups.

You're not near 300hp on stock tune / injectors / maf.

*anti tyler* · 08-17-2014, 09:14 PM

I don't think #1 has anything to do with being turbo. at all. I think you've got a dying ignition coil. Best $45 you can spend upgrading it to a blaster 2 coil.

#2 is an obvious sign of using an atmospheric blow off valve with a draw thru MAFs setup.

You should look into swapping your MAFs around to a draw through setup.

& if you'd like a Z32 air flow sensor I've got one with a pigtail for sale.

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08-16-2014, 03:23 PM	#1
ariansarvi Join Date: Aug 2014 Location: Toronto, Ontario Posts: 2 Trader Rating: (0) Feedback Score: 0 reviews	S13 KA-T Problems :( HELP PLEASE Hey everyone, new here and wanted to see if anyone could possibly help me with my problems. Specs: - 92' 240sx KA-T - T3/T4 Turbo - 3 inch exhaust - Stock ECU - FMIC - Prob around 300hp 1st problem: this is recent and not every single time, I'm driving and at slow speeds it just turns off, then it doesn't turn on but cranks for like 30 seconds then turns on again. Note: my dad took it for a drive and he didn't know and put 89 octance. I'm thinking it's a fuel problem, maybe not getting fuel. Please help. 2nd Probelm: When I'm coming to a stop or just slowing down and I put it in neutral, the car does, only in neutral this happens, what I tend to do is right when I ear it's about to die I throw it in first or second then the rpm goes back up. 3rd Problem: I have a boost gauge and A/F ratio guage. The boost gauge seeks fine, the A/F plays a little too much I think, it's not really steady at idle it's around 14-14.3. When I drive sometime it goes crazy and goes all over the place. Also side note, what is "Peak" for my boost gauge and A/f ratio there's a button that turns on "peak" what is it? And should it always be on?

08-17-2014, 11:31 AM	#2
Croustibat Nissanaholic! Join Date: Aug 2011 Location: France - Toulouse Age: 41 Posts: 1,851 Trader Rating: (0) Feedback Score: 0 reviews	Your problems: 1/boost leak 2/maxed MAF and/or injectors, maybe dying fuel pump 3/no tune Fix 1 & 2, then have someone fix #3 for you. Do it before it is too late, if it is not already.

08-17-2014, 02:16 PM	#4
Frank_Jaeger Zilvia FREAK! Join Date: Jan 2012 Location: Port Charlotte, Florida Age: 29 Posts: 1,352 Trader Rating: (1) Feedback Score: 1 reviews	Get some 720cc injectors, any brand. Get an OEM Z32 MAF. Walboro 255 is commonly used in turbo setups. You're not near 300hp on stock tune / injectors / maf.