Low throttle hesitation / misfire. what ya think

[Kev_Z32]

Since there are 600 million things it maybe could be i was curious as to what you guys think. The problem im having is very similar to a misfire but its hard to tell because it is only at low throttle.. Any RPM , any speed any gear however low throttle. I sprayed the intake and throttle bodies with cleaner and it seams to help slightly. Also glanced around for any vac hoses but nothing seems too bad. Any recommendations?

[Kev_Z32]

ps the second i push the gas pedal in more than just cruising speed it goes away, other than that its as if im misfiring but at this point im not sure if thats exactly what its doing . last year i tested all injectors and coil packs. but hey you never know when they wanna die.. i doubt its them however. also at idle its running somewhat rough maybe a bad fire but its hard to tell because even at low throttle it is ok for the most part, its pretty tempermental. HELP!

[Kev_Z32]

Last oil change , 15 miles prior i ran seafoam in the oil and drained it, followed by fresh mobil1 . This was about 30 miles ago.

[Kev_Z32]

all injector connectors are new, all coil pack connectors are in working order or new, the coolant temp sensor connector was actually broken, i found that today, for now i cleaned it and electrical taped it down. Sorry this is all random im just trying to trouble shoot and i keep thinking of things ive done to help you guys help me lol MUCH APPRECIATED!

[Kev_Z32]

It will still misfire at more throttle sometimes but low rpms. missing at idle also. Im doing spark plugs tonight and checking all of the coil packs and all the connections. Any recommendations of what i should do during the spark plug job? spray anything? clean anything? I got ngk platinums 2.50 a piece!! lol

[nissanfreak12]

I can tell you right now you have the wrong plugs, ours usually go for 6-8 a piece. They are very specific and you cant just get them at any autoparts store. It is very possible the injectors are sticking, very common for the older style injectors with methanol in the fuel. I have had some really good luck with seafoam on cleaning the injectors, maybe give that a shot.

Also doing a balance test will pinpoint which cylinder will be misfiring.

[Kev_Z32]

I got them at cost lol but they are ngk g power platinums. i didnt know ngk made more than one ! lol and sea foam in the intake ? oil? gas? all of the above what do u recommend? also my gas cap when opened will hiss like it is releasing pressure. it is slightly excessive. I know its a pressurized system but if there could be a problem associated with a lack of ventilation. and ps if they are the right plug, the warehouse has 72 more in stock lol and ill ship them out to you guys if ya want. it came to 18.25 after tax

[Kev_Z32]

part number 7090 please let me know soon if they are wrong because they will be installed in about 45 mins

[nissanfreak12]

The number on the plug should be PFR6G-11 for NA. The way seafoam worked for me is in the Gas. Half bottle for full tank.

[Kev_Z32]

lol i got the wrong plugsi got basic ngk platinums. damnit. last time i got them i went thru czp too! lol but these ones are ok for now the old ones were pretty bad and all 6 cyls are firing way better. however its not perfect. im not sure what it is . missing at idle... hesitating. missing at some lower rpms and lower throttle. what should i check now? ill get the right plugs when i figure this out in case i lean or foul one or some out.

[JayShep1]

I read this article and it has a couple of lists in it that might help. I am going to check some of these things out asap..

post5404918.html?hilit=hesitating#p5404918

[nissanfreak12]

Very possible you have an injector going south. Have you tested them?

[JayShep1]

Forgot to update, but I swapped plugs with the new NGK's and the hesitation went away. Worked like a charm