!994 chevy truck backfires help Please!

[rjarvijr]

My truck a 94 chevt silverado 2 wheel drive 5.7L 3500 k2500 backfires when I take of from stop or give it gas on freeway. This is begining to happen more frequently now. just 1 or 2 backfire noises it started a month ago like this it wouldn't shift into gear all the time I would have to help it shift with gas pedal. I changed PVC, Air Filter, Inline Fuel Filter. Any suggestions? Could it be distributor cap or EGR valve Help please where should I start?

Thanks, Rich

[danny]

welcome to the forum. are you able to check your fuel pressure?

[rjarvijr]

no i could learn anything i need to do it

[dougbfresh]

You need to buy a fuel pressure gauge to do this. Autozone/Napa, any of the parts stores will have one.

[Slamminhoyt]

it could be the whole plug, cap, rotor, etc. thing.

but get a fuel pressure guage and check out the fuel pressure! you can probably get one for 35-40 bucks.

jerod

[rjarvijr]

Thanks guys I will purchase one this weekend and give it a try. How do I do it.

[Jerryt118]

Look on your fuel rails and there will be a place at the end to hock up the gauge that looks like a value steam with a cap on it. Test in the on postion with the engine off. and with it running. You will have to do some checking around to see what pressure you should have.

[justen]

If it's not the fuel or anything else above mentioned, My next best guess is egr valve. Bad egr valves will make engine hesitate, backfire, rough idle. Usually you'll get a check engine light but not always.

[rjarvijr]

no check engine light I recall a couple months ago that my speedometer was sticking could that have anything to do with it? Or what about my rear drum brakes I recall my brake light used to come on but then it just stopped. I have new wires and cap and rotor I will change today. Thanks everyone

[rjarvijr]

I want to say thank you to everyone that gave me some advice. I appreciate it greatly. I changed my plug wires, distributor cap and rotor the plugs looked really good especially for a truck with 155,000 miles on it. And they have been in there for at least 2 yrs. As soon as I made these changes amd fired her up. I knew everything was going to be fine. She runs great purrs like a contented cat. Back in March of this year I put the truck in the shop for a tune-up oil change, front brakes, etc. Well I really wasn't happy with the work they did. But I didn't say anything cause I use the truck everyday in my business and for personnal use. Well the shop was Firestone and it's very dissapointing that a national chain like that did such a opoor job. it cost me 600.00 for what they said they did. I really don't think they changed anything not even a air filter. Only the disc pads. I can't prove it but will never go there again. I don't mind the cost but I really care about the quality. Well thanks again. Rich

http://www.deserteagleplumbing.com

[danny]

thank you for posting the update. it's good to know that you recieved help and all's good.