slight hesitation after new ngk plugs

[eliterit]

this past week i replaced my spark plugs in my sr with some fresh bkr6e ngk vpowers gapped to .32.

car seemed to run great, until i would be at cruising speeds not on boost, but on the throttle a little and i would get a noticable hesitation.

this is on a bone stock sr with 3" downpipe no cat and 2.5" crush bent piping on 7psi.

I thought to myself that I had gone with too big of a gap and that the spark is getting blown out. So i went and got some more bkr6e's and this time gapped them to .28. Same thing is happening. I'm going to try and put back in the plugs that came with the car, which were bcp..something ngk platinum plugs.

anyone have a similar situation?
Modified by eliterit at 2:12 AM 4/27/2005

[eliterit]

okay so i put back the plugs that the sr came with which are regular copper ngk plugs bcpr6es and it still has hesistation.

so i decided to change the fuel filter, and as it turns out the sr motor doesnt like clogged fuel filters. As soon as i switched to a 300zx filter it did not hesitate at all anymore. Wooho!!

[SRMatt]

I have a similar problem like you did. Did it kind of bogg out slightly in lower rpm's then seem fine above 3 thousand ?? Someone told me that its coilpacks but I might as well spend 10 bucks to see if thats the problem.

[eliterit]

it honestly felt like ignition/spark problem. and it would mainly happen like if iwas in a low rpm and trying to accellerate in 4th or 5th. but if i got on it, it would go away. I was so happy to find out that it was just as simple as a filter.

[SRMatt]

Thats pretty much what my car is doing but in every gear.

[eliterit]

ok ,so after driving the car the whole day, the hesitation/sputter has come back, and it happens in any gear.

i'm going to check the timing today, and tomorrow i might make one of those homemade boost leak detectors that someone posted on here.

[eliterit]

ok, so can someone just chime in on this post. I have a feeling i know what my problem is now.

checked and adjusted timing as per fsm and its right at 15 and still hesitates/sputters.

First of all, I finally noticed the problem all started when i changed plugs. Before that, the car ran like a champ and never hesitated once.

So I'm beginning to think that when i was tinkering with my coilpacks, I might have caused one to go bad or something. Even going back to the original plugs that it didnt hesitate with wont help.

Tomorrow, i'm going to see if a friend will lend me his good coilpacks to see if that helps, if it does, i may have to order that expensive *** splitfire coilpack kit. Unless someone knows a good place to get cheap NEW coilpacks. The only place i've been able to find them is phase2 and they're like 70 a coil.For 120 more , might as well upgrade right?

[rudee023]

I got some used one running fine if you need them. $100 plus shipping.

[eliterit]

thanks for the help guys.

With the help of some friends they found a soldered connection to the ignitor had broke loose and was the problem all along. We were getting no spark on cylinders 1 and 3. A nice resoldered connection and I'm good to go. No more hesitation at random rpms either.

What a releif.

[compression]

Hey, thats what you said about the fuel filter! are you sure this time?In my years of working on cars, never ever ever has a fuel filter caused a problem (unless it was leaking gas). I think too often it is the first to be blamed even though they last a really long time.