Truck issues?

[wadu1]

I have a 1994 Chev K1500 with a 350 CID that I bought new back then. I'm having issues the service engine soon light has been coming on when under load (uphill). Now the light does not come on but starts missing badly when under the same load condition. Where can I get a dystonic check done for older vehicles? I want to be able to do my own work if possible.
Thanks

[FC]

I am not sure what a check involving involuntary muscle movements will reveal on your truck but I am definitely paying attention to this thread!

I would pull the code and see what it is before doing anything, honestly you may be better off seeing a shop for this as anything without diagnosing the problem is just guessing. Guessing can get pretty expensive.

[fish vacuum]

Parts stores like O'Reilley's or Autozone might be able to pull codes and tell you what's up for free.

[papisjeep]

its really easy to do yourself ya just need a paperclip

http://www.troublecodes.net/gm/

[jackelope]

Parts stores like O'Reilley's or Autozone might be able to pull codes and tell you what's up for free.

They'd need a OBD1 scanner and then you're still guessing. That's a code, it's not a diagnosis of the problem. OBD1 is old school and might be tough to come by via the parts store route.

[boneaddict]

Might have gotten some bad gas or it is that time of year.  Might just try a little "Heat" and see if that helps in the meantime. 

[washelkhunter]

 Bad plug wires? Fuel filter gunked up? Dirty injectors?

[KFhunter]

Pull the fuel filter and look for globs of rust or gunk first.



Start with all the simple things and eliminate the easy problem before you drop the tank and pull the fuel lines.

[whacker1]

oxygen sensors?

tune up time would be my second guess.

bad plug, wire, fuel filter, etc causing the problem

[jackelope]

Pull the fuel filter and look for globs of rust or gunk first.



Start with all the simple things and eliminate the easy problem before you drop the tank and pull the fuel lines.

Why would he do that?

[KFhunter]

heavy miss under load screams fuel delivery to me.

[wadu1]

Parts stores like O'Reilley's or Autozone might be able to pull codes and tell you what's up for free.

They'd need a OBD1 scanner and then you're still guessing. That's a code, it's not a diagnosis of the problem. OBD1 is old school and might be tough to come by via the parts store route.

The place I took it said I would need to have OBD1 type scanner done to find the fault codes. The two places near me with OBD1 scanner will only do it if they work on it. I'll try doing a tune-up, gas filter and run some injector cleaner first. I did use Heat in my last fill up and it did not correct anything, I also only run Union 76 or Chevron fuel because of issues with cheap gas. Thanks

[toothfangclaw]

Parts stores like O'Reilley's or Autozone might be able to pull codes and tell you what's up for free.

They'd need a OBD1 scanner and then you're still guessing. That's a code, it's not a diagnosis of the problem. OBD1 is old school and might be tough to come by via the parts store route.

The place I took it said I would need to have OBD1 type scanner done to find the fault codes. The two places near me with OBD1 scanner will only do it if they work on it. I'll try doing a tune-up, gas filter and run some injector cleaner first. I did use Heat in my last fill up and it did not correct anything, I also only run Union 76 or Chevron fuel because of issues with cheap gas. Thanks

This is the answer to find codes.

its really easy to do yourself ya just need a paperclip

http://www.troublecodes.net/gm/

[CAMPMEAT]

C'mon Greg, spend $50,000 on a new truck.....

[Rich_S]

My '92 GMC Sonoma with the 4.3L V-6 (basically a 6-cyl. 350 V-8 missing the last two) Was doing the same thing. A new distributor cap and rotor fixed the problem. A year later, it started again. My son looked at it and told me I had the cheap cap with Aluminum contacts. He replaced it with a good one with Copper contacts and it's been working fine since.

If your distributor cap is over a couple of years old, I would replace it (including the rotor) just on general principles.