Author Topic: Like hicups ?  (Read 2901 times)

Offline Tazman

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Like hicups ?
« on: September 12, 2016, 07:17:29 PM »
Coming home from work on the freeway with light traffic backlogs and going about 25 to 30 mile per hour. When giving it just a little gas it stumbled or kind of like hiccupped. No check engine light came on yet it did this about a dozen times but only when going between 25 to 35 mph, when going faster it worked great. When making a turn and getting up to speed it worked great. I know this can sound like fuel pressure yet I do not understand that if it is then why does it not do it all the time?

Thanks,
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Offline zieg85

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    • 73-87 GM squarebody extended cab and conversions up to 91 R/V series
Re: Like hicups ?
« Reply #1 on: September 12, 2016, 07:50:37 PM »
It may be a plug wire breaking down, light load on a low rpm are a booger to track down sometimes.  Minor vacuum leak/lean miss is another possibility
Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Online bd

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Re: Like hicups ?
« Reply #2 on: September 12, 2016, 08:07:57 PM »
I agree.  A bad wire, worn or cracked spark plug, perforating coil or rotor, carbon tracking in the cap - virtually any breakdown in the ignition secondary circuit can cause this.
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline Stewart G Griffin

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Re: Like hicups ?
« Reply #3 on: September 12, 2016, 09:52:07 PM »
Also check both battery cables for tightness and condition.