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-   -   Need Some Help Guys! Truck won't start :-( (http://www.ramforumz.com/showthread.php?t=62603)

Chet Stedman 09-29-2010 08:06 PM

Need Some Help Guys! Truck won't start :-(
 
Hey guys, I'll try to make this quick and to the point. This past weekend I was on the hi-way and the engine starting to act up. It would not accelerate past 65MPH and the truck was shaking very hard. There was also a knocking noise coming from the engine. I do all the work on my truck so I started investigating. I personally though it was the plugs/Cap or rotor. To my discovery half the plugs were junk and the cap and rotor were in bad shape, so I swapped them out with all brand new quality parts from VIP. Now the engine will NOT START. There are no Sparks coming from any of the plugs either. The coil also has no spark when I try to turn it over. Do you think I fried the computer or coil?? Any Ideas guys???


1999 Ram Sport 1500
5.2 V-8

rickerred 09-30-2010 07:42 AM

Did you replace the plug wires? You could test your coil with a new wire. Try this:

(1) To set up the test, remove one spark plug wire from its plug, then remove the spark plug using a spark plug socket. Next put the spark plug back into the spark plug wire. Be careful not to let anything drop into the empty spark plug hole -- very bad. Holding the plug wire with insulated pliers, find a spot on the engine that is a good and easily accessible grounding point. Pretty much any exposed metal, including the engine itself, will do.

Holding the spark plug wire with your pliers, touch the threaded portion of the spark plug to the grounding point. Have somebody crank the engine with the key, and look for a bright blue spark to jump across the spark plug gap. If you see a nice, bright spark (clearly visible in daylight) your coil is doing its job.

(2) Using a multimeter: Find the resistance specifications for your car's primary coil winding in your repair manual. Then using a multimeter, place the leads on the smaller, outside poles if you have a traditional round coil, or on the indicated poles if you have a newer enclosed unit. If the reading is within the range indicated in your manual, your primary winding is ok and you can go on to the secondary test. if it is even a little out of spec, the coil should be replaced.
The secondary winding of your ignition coil delivers the spark to the distributor to be sent to the spark plugs. If it's bad, you'll get a weak spark or no spark at all.

To test the coil's secondary winding, attach the test probes to the outer 12V pole and the center pole (where the main wire goes to the distributor). Determine the resistance and check to see if it's within the range indicated in your repair manual. If it is, your coil is up to the task. If it's even slightly out of range, your coil should be replaced.

Good Luck Let us know how you make out.:smileup:

erm 09-30-2010 09:15 AM

And is there any power getting to the coil?

Chet Stedman 10-01-2010 10:15 AM

Ok so far I've replaced all plugs and wires as well as the cap and rotor. Still no spark, I tested the coil and checked the fuses, still no spark. I replaced the crank position sensor and boom first try my engine fires right up, but it is running very lean possibly on 4 or 5 cylinders and stalls often. This never happened before the day it started acting up. I think it needs a new distributor which I just dont have the tools for doing myself.

RamTech 10-01-2010 10:25 AM

How are you determining that it's running too lean? Are you getting P codes of any kind?

Chet Stedman 10-01-2010 10:29 AM

I've got 0 codes through all of these problems. I'm going by what it feels like since I know how it runs when its correct. It has very limited power. The Dist. Cap has a screw that was broken by the previos owner so it is only screwed in on one side (screw is broken in the thread) So its also possible that the rotor is misfiring inside the cap. Either way I dont have the means of doing that job :-( which hurts the most.

RamTech 10-01-2010 11:09 AM

Sounds like it's time to check fuel pressure and volume.


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