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Car Choking While Cruising

Kaz200

By Kaz200,
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Kaz200 Grand Master

Kaz200

Posted
Posted

Hey guys,

having an issue with my s15 (sr20det).. no idea where to start :\ similar issues seen with skylines so yeah..

Car is choking while cruising, feels like its going to stall eventually. Was fine all week until Thurs night and then got progressively worse.

Seems worse at 60km/hr or low speed than 80km/hr. If I thrash it, it seems ok..? Maybe?

Maybe a related issue that has been going on for a few weeks is when braking to red light, sometimes the revs drop to about 200, cpl of times it has actually stalled on the freeway in heavy traffic/freeway carpark.

Have looked at every hose (I think), cannot see a vacuum hose off anywhere..

I thought AFM for the choking issue but swapped it yesterday with a friends and no difference.

Plugs were done a few months ago, pulled them out, they seem ok, asked 2 ppl for advice they said they look ok as well..

What else to check?

Another friend said o2 sensor but I think my fuel economy would be shit if it was that.

No idea when the fuel filter was last done as I haven't had this car long, would that be an issue?

Im thinking ignition or fuel at this point but not sure..

Thanks for any help :(

Kaz

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Kaz200 Grand Master

Kaz200

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Posted

hmm ok the only hoses i havent checked is the FMIC joiners at the bottom.. will check today

I'm in westside melb..

hmm ok well im going to Autobarn to get fuel filter soon...

Gawd at this point it has not been narrowed down, I'm only getting more suggestions lol.. thats helpful but not, at the same time lol :(

Bsa Mentor

Bsa

Posted
Posted

I would try fuel filter first also check pump flow a mechanic shop should be able to do this one other thing could be the cat could be blocked. Might be worth putting it on the dyno and removing the exhaust and checking the rest

mad082 Grand Master

mad082

Posted
Posted

try a new fuel filter.

is there any kind of EGR (exhaust gas return) on the car? it may be that it needs to be cleaned out. i know that is a common issue with the natro sr20's.

also try unplugging the o2 sensor and seeing what that does.

finally, is the car auto or manual?

Kaz200 Grand Master

Kaz200

Posted
  • Author
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changed fuel filter today.. noticeable improvement in driving tonight but not sure if it's fixed it.. will test more tomorrow when going to work.. I suspect not tho it seemed to start faltering a little bit..

EGR.. nfi.

hmm cat blocked.. thats a possibility.. fuuuu so many things to check :(

need to borrow consult and see what it says.. tho from prev experience (180/r32) it usually has no faults lol, so may prove worthless..

KnightRiderR33 Collaborator

KnightRiderR33

Posted
Posted

did you clean the POD filter recently? i used a k&N recharge kit on mine once and applied to much oil which in turn stufed my MAF sensor give it a good clean with crc MAF cleaner and see how it goes i took it to 5 different mechanics wasted money on CAS coils Ignitor fuel pump then to find it was the MAF

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