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97 altima rough idling/ bpt, iat, egr sensor??
Hi there!! Newbor to forum who needs help diagnosing rough idling on 97 altima. Typing on iPhone, so will keep everything short for this posting.
Stats on car:
Things replaced to try and fix rough idling/misfire:
Engine cover gasket replaced (fixed and cleared #4 cylinder misfire)
Distributor rotor,seals, and cap replaced
New spark plugs and wires after engine cover gasket repair
New alternator( this was a separate problem)
Just replaced egr valve and gasket( scraped off old gasket and carbon from egr base including 2 opening holes in base)( I was told there is no egr pipe in my car, so didn,t do that.) ( FYI, this cleared egr code)
After all this with codes cleared, 0400 code came up for about 2 weeks but now there is no codes for past couple of weeks.
Running rough at idle, chugging out of tailpipe. Worst is when in park idling, but no engine cut out so far. 500-1000 rpm is when it is bad. Barely noticeable over 2000 rpm (aka highway)