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05-11-2011, 07:34 AM
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#1 |
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Registered User
Join Date: Aug 2001
Location: NEWTON,N.C. USA
Posts: 16
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truck misses
hello everybody my truck is a 97 chevy k 1500 350 ci auto, it has central fuel injection but not throttle body. it has a recuring miss that doesnt do it all the time mainly it misses when u just pull off from stop. and more so when it needs to kick down to third gear it will miss when pulling a slight grade.
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05-11-2011, 07:10 PM
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#2 |
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One day...
Join Date: Apr 2008
Location: Tuttle, Ok
Posts: 9,240
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Re: truck misses
Does it have any codes or anything that show up?
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05-12-2011, 06:29 AM
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#3 |
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Registered User
Join Date: Jan 2006
Location: Smithfield, VA
Posts: 1,501
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Re: truck misses
The TB sits atop the plastic intake plenum. When was the last time you had at least an ignition tune up? I have to replace the dist. cap and rotor at least every 15 months till I got ones with brass contacts.
If it's not throwing a SES light, it's not an actual miss. Often a bad EGR will make the engine run rough just off idle. Pull the connector to the EGR valve and run it. See what happens. You may also want to clean it, the TB and the IAC. |
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05-12-2011, 08:25 AM
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#4 |
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Registered User
Join Date: Aug 2001
Location: NEWTON,N.C. USA
Posts: 16
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Re: truck misses
i have tuned up engine within six months, new plugs wires cap and rotor. it hasnt had a check engine light in a while. it doesnt miss all the time its sporatic then sometime its everyday. ive cleaned intake air box and clean throttle valve also. only code its displayed is o2 sensor heater malfunction reset and it hasnt done it since.
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05-17-2011, 08:57 AM
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#5 |
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Registered User
Join Date: Aug 2001
Location: NEWTON,N.C. USA
Posts: 16
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Re: truck misses
thank guys for your replies. i changed out all o2 sensors this weekend that still didnt fix it i also checked egr valve, pulled plug there wasnt any change except the computor threw a code for egr pintle position. ill keep lookig for something. let me know if hear of anything , thanks
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05-17-2011, 09:49 AM
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#6 |
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Old Skool Club
 
Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Re: truck misses
Have you looked at the MAF sensor? Mine was nasty and I had an intermittent miss. Cleaned it with a Q-Tip and alcohol. Runs good.
__________________
Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was. |
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05-18-2011, 08:52 PM
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#7 |
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Registered User
Join Date: Aug 2001
Location: NEWTON,N.C. USA
Posts: 16
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Re: truck misses
yes i pulled the maf sensor and cleaned it with carb cleaner, didnt change any thing, changed out o2 sensors and that didnt either. drove truck today and it didnt miss at all weather was cooler today in north carolina. monday it was warmer when i drove it and it missed some that day. ive changed air intake temp sensor. both coolant sensors, just keeps my quessing as to what this is
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