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Author Topic: Can't figure it out!  (Read 29253 times)

Offline Layne

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Re: Can't figure it out!
« Reply #60 on: February 23, 2010, 03:19:50 pm »
Sorry, I just got up for work. Nothing other than 12 is what I meant.
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77 c-10 - 77 400 86 700r4 "Emmy"
83 citation - 2.5L Four on the Floor!
88 sierra - reman 350 700r4 "Eleanor"
All normal practicality and rational money handling goes out of the window when it comes to my truck.

Offline k5blazerfan

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Re: Can't figure it out!
« Reply #61 on: February 24, 2010, 01:41:42 am »
ok then im stumped not really just means all the sensors and comp are working right... that takes care of that headache....ok ill throw out a few suggestions here.... cat, fuel filter, clogged injector... bad fuel pressure? i dunno much bout computer efi trucks lol... hey wait a minute.... has the cat ever been replaced with a universal cat?? and is there any o2 sensors before the cat or after?
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Offline Irish_Alley

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Re: Can't figure it out!
« Reply #62 on: February 24, 2010, 01:50:32 am »
Quote from: Irish_Alley on January 05, 2010, 12:40:35 am
I'm thinking  cat due to the sulpher smell
Quote from: Irish_Alley on February 15, 2010, 12:58:15 am
sorry bout the vandals but yup the cat seams to be the problem with the sulpher smell and all, i would take the flange apart were you said the donut is bad since you have to replace that anyway and run it with open manifolds lol and see how that does
have you tried anything with the cat. would it even give a code since the o2 sensor is before the cat?
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If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

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Offline Layne

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Re: Can't figure it out!
« Reply #63 on: February 24, 2010, 06:28:13 am »
Haven't done anything with the cat yet. I've been sick. I'm not sure, but I think it's directly related to my window situation. New fuel filter, injectors spray good, cat is original.
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77 c-10 - 77 400 86 700r4 "Emmy"
83 citation - 2.5L Four on the Floor!
88 sierra - reman 350 700r4 "Eleanor"
All normal practicality and rational money handling goes out of the window when it comes to my truck.

Offline k5blazerfan

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Re: Can't figure it out!
« Reply #64 on: February 25, 2010, 01:14:42 am »
ok well im stumped then if the cat and o2 sensors havent ever been changed or moved then i dont really know... i know if you change the cat with a universal and end up moving the o2 sensors to far ahead of the cat or 2 far behind it i know you will run into problems
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Don't forget the tow chain!!! Might have to tow a ford home! :)

Offline VileZambonie

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Re: Can't figure it out!
« Reply #65 on: February 25, 2010, 08:00:27 am »
What is the truck doing now? you said fuel pressure is good. Did you check it with a gauge?
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Layne

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Re: Can't figure it out!
« Reply #66 on: February 25, 2010, 11:42:28 am »
Buttita bros checked it with the filter off. they said it was 12psi. It really doesn't do much of anything anymore except chug every once in a great while. It's terrible in cruise, but with a steady pedal, it'll kinda lurch at say 55 then all I do is mash the gas let all the way off as quick as possible and resume 55 mph.
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77 c-10 - 77 400 86 700r4 "Emmy"
83 citation - 2.5L Four on the Floor!
88 sierra - reman 350 700r4 "Eleanor"
All normal practicality and rational money handling goes out of the window when it comes to my truck.

Offline VileZambonie

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Re: Can't figure it out!
« Reply #67 on: February 25, 2010, 11:50:34 am »
Is this a 700R4? Is it going into lock up too soon?
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              ⌠¯¯¯¯¯'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Layne

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Re: Can't figure it out!
« Reply #68 on: February 25, 2010, 11:58:10 am »
Yeah. I never thought of the trans, but would that cycle on and off repeatedly giving you whiplash?
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77 c-10 - 77 400 86 700r4 "Emmy"
83 citation - 2.5L Four on the Floor!
88 sierra - reman 350 700r4 "Eleanor"
All normal practicality and rational money handling goes out of the window when it comes to my truck.

Offline VileZambonie

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Re: Can't figure it out!
« Reply #69 on: February 25, 2010, 12:02:15 pm »
If it's really harsh (bucking) and you're sure it's not an ignition system realted misfire I'd be leaning towards your fuel pump. If it's just boggy until you punch it, tighten up the tv cable.
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                         /  _ _ _\_
              ⌠¯¯¯¯¯'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Layne

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Re: Can't figure it out!
« Reply #70 on: February 25, 2010, 12:06:30 pm »
The plug wires are pretty crusty. I was in the middle of a by the week tune-up when these problems happened. IE week one, plugs, week 2 cap and rotor. I was broke btw. LOL.
Do you think the pump was operable when they checked, and it just acts up when i drive it? You know, one of those little things that when you call on the expert, it wants to work good?
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77 c-10 - 77 400 86 700r4 "Emmy"
83 citation - 2.5L Four on the Floor!
88 sierra - reman 350 700r4 "Eleanor"
All normal practicality and rational money handling goes out of the window when it comes to my truck.
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