PDA

View Full Version : need help.plzzz s14 driving me nuts


infam0usndn2nv
10-16-2010, 06:22 PM
i have a 96 zenki with black top in it. every time the weather is cold outside it starts to sound like a subaru and shakes alot, drives crappy but when the weather is nice and warm it drives like a baby. when i am on idle in cold weather the car idles below 1k and wideband shows lean. but when i start to drive the car it still shows lean as soon as i let off the gas pedal it goes to rich and back to lean. yesterday i was driving the car and it was crappy but i let it sit for abt 15 mins then it was good and driving normal i drove around the whole day and then later as soon as i hit a lil bump it started driving crappy again then hit another bump and its good and same thing over and over again. i did smoke test on it and found no vacuum leak the car has proper ground. cleaned the iacv and maf. i am going nuts tryna figure this out plz help meeeeeeeeeeee. thank you all in advance

Jbma327
10-17-2010, 02:56 AM
if its running lean try to check to see if all your injectors are firing correctly.

240zach
10-17-2010, 03:26 AM
maybe try just checking to see if its getting spark in all 4 cylinders, and if not maybe its a spark plug, if it is, check to see if its getting fuel in all four, like when its idling low, unplug one injector at a time and if you pull one out and idle stays the same its your injector, or its the injector wireing or the spark plug wires, check all that shit.lol

infam0usndn2nv
10-17-2010, 05:39 AM
i checked the coils and they were all firing i will check for the fuel injectors today. any one else having this problem?? only does it in cold weather.......i hate winter aaaaaaahhhhhhhhhhhhhhhhhh

SR20Driftking4lyf
10-18-2010, 10:11 PM
I had a similar problem with my s13 sr and it was the wire that sends signal from the MAF to the ECU had rubbed through the plastic insulation and was grounding out. Had similar symptoms with running way lean and way rich, as well as running shitty when I hit bumps in the road. Wouldn't hurt to poke around with a volt meter!

Rabboni
10-19-2010, 12:15 AM
In my experience, when your running condition changes because of bumps in the road, its usually caused by bad wiring moving and grounding out. Do as stated above and check the maf wiring, and any other wiring you can think of.