The KA SOHC Problem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

J40sx · 07-15-2008, 02:02 AM

1990 fastback
has around 59,XXX miles (original)
completely stock motor

My car rattles when i start it up, must be that infamous timing guide that is being chewed up, it only rattles for less than a second!

I first noticed something different about my car when it started
to jerk excessively. So i have to add tons of gas to stop the jerks.
Then the idle started to act up, i would start it up cold in the morning
usually the rpm goes up to 1,200-1,300 around there and last a while to warm up the engine, now it just shoots up for less than a second then it just goes down to 900 rpms.
After a short drive, it starts to idle at 800rpms.

The other problem:
I was at a car meet and my car just suddely dies when i try to start it.
There are plenty of cars around so i jump start my car and it works perfect. I leave it on so the alternator can juice up the battery. Afterwards i turned it off. Later on cops decided to raid the meet, so everyone is leaving, then i started my car, and nothing, would not start. I even asked the cops to help me start my car, does bastards just dicthed me and said call a "tow truck" so i was by myself for a second, friends showed up, and jumped start the car, works as soon as the head lights are turned on it dies, so i got a new battery.
A month later the car does not start after a day and a half without driving.
Its a new battery immposible!!!
I noticed a cranking noise couple days before, when i would start the car, not it won't start at all.

Any clues?
jump the battery agian?
bad alternator?
Clean the MAFS and IACV?

i will try to figure this out tom

thanks

SoguRacing · 07-15-2008, 02:35 AM

maybe the alternator is bad or not sending a constant charge. check your wiring connections. check for shorts or loose connections. did the car run fine when you installed the new battery?

J40sx · 07-15-2008, 01:09 PM

yea the car ran fine for a month with that new battery
then it started acting up again today

J40sx · 07-15-2008, 04:44 PM

any more suggestions?
anyone

nieko · 07-29-2008, 02:32 AM

did you relocate your battery to the trunk by any chance? my friend recently did this and was having the EXACT same problem. we figured out it was the wrong gauge wire for the positive.

07-15-2008, 02:02 AM	#1
J40sx Zilvia Junkie Join Date: Feb 2008 Location: Santa ana Posts: 515 Trader Rating: (8) Feedback Score: 8 reviews	The KA SOHC Problem 1990 fastback has around 59,XXX miles (original) completely stock motor My car rattles when i start it up, must be that infamous timing guide that is being chewed up, it only rattles for less than a second! I first noticed something different about my car when it started to jerk excessively. So i have to add tons of gas to stop the jerks. Then the idle started to act up, i would start it up cold in the morning usually the rpm goes up to 1,200-1,300 around there and last a while to warm up the engine, now it just shoots up for less than a second then it just goes down to 900 rpms. After a short drive, it starts to idle at 800rpms. The other problem: I was at a car meet and my car just suddely dies when i try to start it. There are plenty of cars around so i jump start my car and it works perfect. I leave it on so the alternator can juice up the battery. Afterwards i turned it off. Later on cops decided to raid the meet, so everyone is leaving, then i started my car, and nothing, would not start. I even asked the cops to help me start my car, does bastards just dicthed me and said call a "tow truck" so i was by myself for a second, friends showed up, and jumped start the car, works as soon as the head lights are turned on it dies, so i got a new battery. A month later the car does not start after a day and a half without driving. Its a new battery immposible!!! I noticed a cranking noise couple days before, when i would start the car, not it won't start at all. Any clues? jump the battery agian? bad alternator? Clean the MAFS and IACV? i will try to figure this out tom thanks __________________ dying is only living, dying to live Last edited by J40sx; 07-15-2008 at 04:54 PM..

07-15-2008, 02:35 AM	#2
SoguRacing Post Whore! Join Date: Nov 2007 Location: (714) Age: 39 Posts: 2,967 Trader Rating: (23) Rides Gallery: SoguRacing Feedback Score: 23 reviews	maybe the alternator is bad or not sending a constant charge. check your wiring connections. check for shorts or loose connections. did the car run fine when you installed the new battery? __________________ Pre Tune Checkup! Compression,LeakDown,Vacuum Test $80. Cams Install: $180

07-15-2008, 01:09 PM	#3
J40sx Zilvia Junkie Join Date: Feb 2008 Location: Santa ana Posts: 515 Trader Rating: (8) Feedback Score: 8 reviews	yea the car ran fine for a month with that new battery then it started acting up again today __________________ dying is only living, dying to live

07-15-2008, 04:44 PM	#4
J40sx Zilvia Junkie Join Date: Feb 2008 Location: Santa ana Posts: 515 Trader Rating: (8) Feedback Score: 8 reviews	any more suggestions? anyone __________________ dying is only living, dying to live

07-29-2008, 02:32 AM	#5
nieko Post Whore! Join Date: Sep 2007 Location: Westminster Age: 34 Posts: 2,695 Trader Rating: (14) Feedback Score: 14 reviews	did you relocate your battery to the trunk by any chance? my friend recently did this and was having the EXACT same problem. we figured out it was the wrong gauge wire for the positive.