MJBBMANO

I replaced my spark plugs with Bosch twice and they were misfiring both times. I took them back to Advance auto parts which they replaced them for me. I got NGK which is what the truck had and the problem was gone. I say go with the NGK.

UPDATE: Has anyone ever heard of Sea Foam? Well I added Sea Foam to my tank and filled up with Shell V-Power 93 Octane. After running for 100+ miles it hasn't missed a beat. Yesterday it did it slightly, but only twice(before 100 miles). Today it hasn't done it at all (after 100+ miles). Do you think it could have been my Fuel sysytem and injectors that needed to be cleand since I have never cleaned them since buying the truck in 97? I'm having my fuel filter changed tomorrow.

Thanks for the info. Sorry for sounding like a scratched CD. No offense taken. I'll try the fuel filter first. I had another mechanic tell me to put high octane gas in it for a week to see if it helps. He said it can also be an injector and that the problem will not cause me to break down. Hey thanks for all your help and I'll keep you posted.

Is this something that I can change and if so where exactly is it located?

I meant to say the thermostat was changed. How do you test a ECT?

Fuel filter has never been changed. I had the temperture gauge changed when they did the timing belt and water pump (Jan 2008). Are you refering to the same thing?

Would changing the fuel filter help?

I changed the wires and it was great until an hour later it started doing the same thing. Except this time it does it a bit less. It will only do it when the truck temp gauge is at half / In Drive @ a complete stop/ A/C on. I did notice I have a bit more power when I step on the gas. Any ideas?

I haven't got the wires yet. I'm getting them this weekend. It does it when I'm stopped and the truck is in 'DRIVE' and a lot more when the A/C is on. I decided to drive my Honda to Miami instead because I don't want to take the risk the truck stalling on me. I'll post on Saturday if new wires do the trick (I Hope they do).

The plugs were replaced December 2007 and have maybe 1000 miles. The wires have never been replaced and I have 160,000 miles on the truck.

Thanks for the info. I took the truck last Friday and he changed my Dis, cap and rotor (paid for parts only) which were bad. Still same problem. I might have described the problem wrong. When the car is at a full stop in "DRIVE" The RPM are at 1 (Example) and they drop a bit and come back to one. This happens a lot more when the A/C is on.The mechanic said its not a knocking but he called it Skipping a beat. Its like if you pull one of the Spark Plug wires out. I was thinking of replacing the spark plug wires since they have never been changed. What do you think? I have to drive 4 hours on Wednesday to Miami, Do you think the vechile will make it? Thanks so much for helping me out.

The mechanic that changed the timing belt said it was the Knock sensor because the computer told him. They cleaned it and I still have the same problem. What do you suggest I tell them? Thanks

Do you happen to know the actual part number and name so I can get at an auto parts store? Is it hard to change? When I have my car in drive and I'm stopped the trucks knocks. It does it more when the AC is on. This started happening when I had the timing belt/waterpump and 3 belts changed.

What is a Knock Sensor on a 1997 Pathfinder LE? What is it for?

I returned the plugs without any problem and they gave NGK Platinums. After installing the NGK Pla. I still had the same problem. I returned them and got the NGK that Nissan recommends. I installed them and the problem stopped. The manager found it strange that the NGK Pla. gave me a problem and when I told him I have 162000 miles he said that's why. I will now stick to NGK regular. Thank you all for your help.

I only replaced the sparg plugs. I put back the old plug in 6 in it had the same problem. When I put #6 back it clicks. The boot moves a bit. This boot was very tight before. Do you know of a way I can tighten the boot?

I was finally able to get the cable off #6. I put a new plug in #6 and now when I turn on the truck it hesitates and turns off. Does anyone know whats wrong? Last week I replaced plug 1-5 and it was running fine until today when #6 was replaced. HELP!

What kind of NGK do you suggest?

Its not the plug I can't remove it's the Cable attached to the plug. I also had the same problem with my Honder and the dealer said to never use anything else except NGK. The ones in the Honda popped out. I just changed them on Sunday 12/16. Do you think Advanced Auto parts will take them back?

I'm having problems removing the cable from plug#6. Does anyone know of a tool that can remove the cable not the plug? I was able to change plug 1-5 with Bosch Platnium Pro. The NKG on my truck were nasty! Thanks