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I’ve only noticed the problem when I’m driving and I let of the gas, normally the idle just drops and it dies, but when I’m able to keep it running, it almost acts like it’s running rich. The motor kinda “chugs” and clears up when the rpms get up, but as soon as it dies and I get it running again, it runs great.
I’ve only noticed the problem when I’m driving and I let of the gas, normally the idle just drops and it dies, but when I’m able to keep it running, it almost acts like it’s running rich. The motor kinda “chugs” and clears up when the rpms get up, but as soon as it dies and I get it running again, it runs great.
[quote=”wysetech” post=72432]I was going by my information I have here. (Mitchell On Demand) unless it’s a misprint. It could be that your gauge is out a bit. That’s why I suggested trying another gauge.[/quote]
If I knew someone with another gauge I would. I’ve been using the one at work on my lunch break haha. I work at an atv dealer/shop, so we’ve got a few specialty tools laying around.
[quote=”wysetech” post=72432]I was going by my information I have here. (Mitchell On Demand) unless it’s a misprint. It could be that your gauge is out a bit. That’s why I suggested trying another gauge.[/quote]
If I knew someone with another gauge I would. I’ve been using the one at work on my lunch break haha. I work at an atv dealer/shop, so we’ve got a few specialty tools laying around.
It was the p0108, but I though if I had a vacuum leak, it’d run bad most of the time, not run bad for a few minutes a couple times a week, and run fine again right after it dies. I never got a maf code either.
It was the p0108, but I though if I had a vacuum leak, it’d run bad most of the time, not run bad for a few minutes a couple times a week, and run fine again right after it dies. I never got a maf code either.
I’ve always heard 60 is what the pressure should be, and 50 to open the injectors.
Might be the gauge tho, my other truck, ’97 chev with the 305 vortec ran just fine with the same pressure reading. How steady should the reading be? It’s steady at idle, but goes up when I rev it, and it drops just below 50 when I let of the gas while the motor slows back down to idle.I’ve always heard 60 is what the pressure should be, and 50 to open the injectors.
Might be the gauge tho, my other truck, ’97 chev with the 305 vortec ran just fine with the same pressure reading. How steady should the reading be? It’s steady at idle, but goes up when I rev it, and it drops just below 50 when I let of the gas while the motor slows back down to idle.Any carbed gm motor of a similar year should be the same. I used to have an ’86 GMC pick-up with the 305. They’re a total mess of vacuum lines, mostly all running emissions stuff haha.
Any carbed gm motor of a similar year should be the same. I used to have an ’86 GMC pick-up with the 305. They’re a total mess of vacuum lines, mostly all running emissions stuff haha.
That might just be how they line up. I know on some ATV engines (I know, not a car engine, but still OHC) when the timing is set correct, the marks may not line up exactly, and moving the timing chain 1 tooth makes it off even worse the other way. Understand what I mean?
Any running problems at all?
That might just be how they line up. I know on some ATV engines (I know, not a car engine, but still OHC) when the timing is set correct, the marks may not line up exactly, and moving the timing chain 1 tooth makes it off even worse the other way. Understand what I mean?
Any running problems at all?
[quote=”college man” post=72409]check fuel pressure and FPR.[/quote]
Fuel pressure is written about (added in after), I’m hoping to put the regulator a little further down my list, gotta pull the intake manifold to get to it haha.
[quote=”college man” post=72409]check fuel pressure and FPR.[/quote]
Fuel pressure is written about (added in after), I’m hoping to put the regulator a little further down my list, gotta pull the intake manifold to get to it haha.
The other issue is I think is the muffler or cat clogged. It loses power when you shove it to the floor, and the rpms get above 4000 rpm. The shift point on these trucks when they’re on the floor is about 5000 rpm, so sometimes it just stays between 4-5000 rpm, and won’t shift up. My old truck (’97 chev) did the exact same thing because of a clogged cat.
So any guesses?I also checked the fuel pressure today, key on it hits 60, and drops to 55 when the pump stops, it idles around 50 psi, and gets close the 60 when I rev it. 60 is what it’s supposed to be at, but my other truck ran fine on about the same pressure. I bought the truck a couple weeks ago, and the past owner says it has a new pump and filter.
So, any guesses? and Thanks for any help in advance.
And sorry for the long read, and the two posts, seemed easier to read and understand in two haha