Light engine backfire.

Tiny
LAYLANDMATTHEW
  • MEMBER
  • 1989 NISSAN 240SX
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 222 MILES
So I was driving home from school(I goto UTI) which is about 30 miles highway driving, and about 2 miles city driving, as I got to my exit and was slowing down I noticed that my temp was going up higher as I came to a stop, so I drove around town and the faster I went the cooler it got, so I pulled into my house and filled my radiator with water, noticing it was a little low. It now longer over heats but I have not drove it yet because, this is my main question, only when right before and at op temp and at idle the car has a very light backfire and as you increase the rpm's to about 2k the popping gets semi louder and more frequent. Engine also feels like it has a misfire

Vehicle History:
Check engine light on, OBDI, Code 35, Exhaust gas tempature sensor.
Timing is set at 17 Degrees Advance.
I usually run 89 or 91 in it but I put 87 in this morning.(Problem didn't start till after drove roughly 50 miles)
Just put in heli coils on 5 out of 8 of the exhaust manifold holes, one is still stripped. The other 2 are fine.

Thursday, April 21st, 2011 AT 12:23 AM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Try giving it a major tune -up and see what happens
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Thursday, April 21st, 2011 AT 12:26 AM
Tiny
LAYLANDMATTHEW
  • MEMBER
  • 2 POSTS
By tune up what do you mean? It's got, new cap, plugs, wires, new oil, water/antifreeze, I was gonna sea foam it this weekend but this happened.

Thank you for the reply.
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Thursday, April 21st, 2011 AT 2:42 AM

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