Author	[Modern View]
Codie 08-26-2012 13:25:53 70.15.67.38 Report to Moderator	My 95 chevy K1500 with 350 is still running rough once warm. New plugs, wires, cap, rotor, fuel and air filter along with colant temp sensor. It only acts up once its warm it runs fine cold. Im really lost, any other ideas? [Reply]   [No Email]
Briar Hill Brittanys 08-26-2012 21:31:56 207.254.163.44 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   Had the same problem with mine, 95 K1500 TBI 350. Started and ran great when cold. Once it warmed up, coughed, sputtered, died at stoplights, inhaled fuel, hard starting when warm. After awhile it finally kicked a code for a bad coolant temp sensor. Replaced, and the problem went away for a week or so. Tracked back to the coolant temp sensor. Ended up being the wire running to the sensor had a bad spot in it. Replaced the damaged section, is running fine again. Old Blue has 240,000 one owner miles. HTH Mark [Reply]  [No Email]
ghostown 08-26-2012 19:53:20 67.142.130.24 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   Had a similar problem with a 92 F-150. Drove me crazy, made an appointment with the dealer, couldn't get it in for a week so I gave it one last shot. Started checking voltages at sensors when hot and they were above 15 volts. Battery had a weak cell when hot, good enough to start the truck but opened up with alternator charging. Replaced the battery and everything was fine, canceled the dealer appointment. [Reply]  [No Email]
gbs 08-26-2012 19:34:41 71.51.250.50 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   check the egr valve it could be stuck,check the tbi gasket they will crack and shrink,check vacuum lines for leaks [Reply]  [No Email]
Centex Farmall 08-26-2012 19:21:35 166.147.72.28 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   Has the fuel pump in the tank ever been replaced? One of the big box stores should have a "loner" fuel pressure test setup you can borrow. [Reply]  [No Email]
toadady 08-26-2012 18:24:02 174.125.34.217 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   i work in a parts store, and i have seen MANY of these distrubitors wear in the housing making the shaft wobble, causing lots of problems, pull it out and see it should have little to NO slack in the shaft, a little up and down is normal [Reply]  [No Email]
James Williams 08-26-2012 18:14:11 69.251.26.114 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   Unplug your EGR valve and see if it makes a difference jimmy [Reply]  [No Email]
Codie 08-26-2012 18:07:16 70.15.67.38 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   Ok thanks for all the ideas. Its a TBI motor. There is no mass air flow sensor on it. Its currently throwing no codes. I changed the oxygen sensor tonight. There is no catalytic converter on it any more and a glass pack muffler so exhaust flow shouldnt be a problem. No smoke in the exhaust either. So Im thinking vaccum leak or distributor/ spark maybe? I did also change the coil. Thanks for the replies. Any more ideas now? [Reply]  [No Email]
barnE 08-26-2012 17:27:51 67.172.83.183 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   Oxy sensor could fail like some I have seen and give too rich mixture. Cold engine too rich would be OK. But after warming up it would be like the choke still on and flood. Look at exhause for lots of black smoke and carbon. Hope this is your situation. Dave [Reply]  [No Email]
Brad Buchanan 08-26-2012 16:30:38 74.71.185.165 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   some of the earlier gm electronic distribtors would flub up when hot and the problem was there is an electronic module with four terminals that would overheat if replaced and not bedded in dialectric grease. Brad [Reply]  [No Email]
charlie n 08-26-2012 16:10:38 96.35.9.190 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   I had the same problem with a 99 5.7 Vortec.I did everything that the others mentioned with no success.Even change the fuel pump TWICE and still had the problem.Finally a good friend figured it was air flow trouble and replaced this.Don't criticize me cause I'm not up on the censers.The computer never thru a code and was diagnosed by process of elimination.Good Luck. [Reply]  [No Email]
Thomas(AB) 08-26-2012 16:43:31 207.107.204.34 Report to Moderator	Re: farm truck problem continued in reply to charlie n, 08-26-2012 16:10:38   that i believe is a mass air flow sensor, mine gets replaced every 3 years, caused alot of grief when it first quit working. never did throw a code for it. [Reply]  [No Email]
Diydave 08-26-2012 15:40:41 96.244.152.143 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   Next time it starts acting up, hook a vacuum guage, to it, or take a can of starter fluid to any suspect vacuum hoses. If the motor speeds up, when you spray a vac hose, it means that hose is leaking vacuum. [Reply]  [No Email]
wgm 08-26-2012 14:58:50 66.11.102.200 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   Take it to a professional if you want it done right. [Reply]  [No Email]
Phil in Pa 08-26-2012 15:11:48 96.61.7.196 Report to Moderator	Re: farm truck problem continued in reply to wgm, 08-26-2012 14:58:50   Yeah, auto repair shops being so cheap and trustworthy and all. [Reply]  [No Email]
Monkey Run 08-26-2012 14:55:09 173.202.12.224 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   Make sure the catalytic converter/muffler have good outflow. Just something else to check. A pack rat built a nest in the air intake of my 94GMC 350, made it run lean, got the converter so hot it melted the matrix inside and plugged up converter and fried the oxygen sensor. Very similar thing on a mid 80's Toyota car I had, but never knew why that one fused the converter. Service guy knew immediately what it was, so I guess it was happening to others. Similar symptoms, at first you could start and run but after a few miles the back pressure would dog down the engine. [Reply]  [No Email]
Dave in GA 08-26-2012 14:46:00 184.36.180.214 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   I would suspect a malfunctioning EGR valve or O2 sensor. [Reply]  [No Email]
Jim in Ma. 08-26-2012 14:41:31 72.70.109.209 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   Codes? another problem could be a worn timing chain or gear. Most often it's the teeth on the cam gear that are bad. [Reply]  [No Email]
DH in Carolina 08-26-2012 14:34:11 173.212.9.211 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   If you have a ground wire at the thermostat housing bolts make sure it is making a good connection. Had a crroded bolt on a 90 that caused all kinds of problems. [Reply]  [No Email]
Bryan iniowa 08-26-2012 14:33:34 209.252.175.31 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   any codes ? Check fuel pressure ,,possible EGR leaking or getting vacuum when it shouldn't . [Reply]  [No Email]
504 08-26-2012 14:29:49 64.111.61.44 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   TBI or Direct injection? [Reply]  [No Email]
Morgan Flowers 08-26-2012 13:58:47 69.55.123.195 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   Have you checked the compression? Just an idea. [Reply]  [No Email]
Wisconsin Cowman 08-26-2012 13:51:53 97.95.49.225 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   Did you check for codes? [Reply]  [No Email]
Sprint 6 08-26-2012 13:47:56 50.102.25.80 Report to Moderator	Re: farm truck problem continued in reply to Codie, 08-26-2012 13:25:53   I'd bet your exhaust system has lost its ground. The oxygen sensor won't work right if the exhaust does not have a good ground. Run a jumper cable from O2 sensor housing to the battery ground and see if it runs better. [Reply]  [No Email]