misfire code I pulled all plugs and no 2 and 4 had a closed gap.

QUESTION:

I have a 2004 Nissan altima 2.5l in the shop. and had a misfire code i pulled all plugs and no 2 and 4 had a closed gap. i ask the customer if a tune up had been done any time and they replied no ,, so it is all oem equipment. so how do i explain the spark plug messing up like that. i threw as new set of ngk’s in it and now it is coming back with the same problem 

ANSWER:

The only explanation is that something inside the cylinder caused the spark plugs to do that. I would recommend to check compression.  And check for timing belt tensioner failure. If the timing was able to fluctuate, it could allow the piston to hit the plug.

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Looking to install reverse beepers on our fleet of cars and trucks

QUESTION:

Looking to install reverse beepers on our fleet of cars and trucks also vans does chevrolet use multi plexing wiring to reverse lights or do i need to install a relay? Pick ups S10-3500 series and vans all range from 1999-2008

ANSWER:

No need for a relay. Just Ground it to the frame and connect your positive to the power supply wire on the back up light bulbs ( you can connect in the wire harness ). No multi plexing to the reverse lights.

2002 camry le a/c light on dash flashes

QUESTION:

2002 Camry le a/c light on dash flashes occasionally and does not cool. Any Suggestions? Checked freon level OK. Heard it may be a relay? Already Tried: checked freon charge 

ANSWER:

The light flashes because the compressor speed is not matching the engine speed. This is usually caused by something not turning the magnetic clutch on for the compressor. The magnetic clutch relay is usually the most common problem. See the link below.

Technical Service Bulletin

the car acts like the clutch is slipping. 2007 ford mustang

QUESTION:

2007 Ford Mustang with a saleen supercharger. spec 2 clutch. when I power shift the car from 2nd to 3rd the car acts like the clutch is slipping. I installed the heavier duty after market disc and pressure plate but the problem still exist. The car only has 9200 miles on it. driven once or twice a week. It has been to the drag strip twice but with the engagement issue it is not very competitive. I have heard their is an issue with the hydraulic slave mechanism?

ANSWER:

Your tires may just be loosing traction. I had a customer with a 2003 Lightning that complained of a transmission slip. I could not verify the problem, so I rode with the customer. He treated the gas pedal like an on/off switch, and every time he lit the tires up, the tach would spike and he said, “see, the trans is slipping!” To my surprise, it would break the tires loose grabbing third gear. Since you are power shifting and you have a supercharger, I think your tires are loosing traction, not your clutch. If it was slipping, it would also slip in higher gears.