S10 4.3l won't accelerate

[jakethesnake]

Had that happen on a 95 dodge ram when I was younger but it turned into a turtle

 

[Mastermind]

Rep for all involved.

I still have trouble believing I was wrong..........

LOL

 

[paragonbuilder]

That is weird Awsome that some of these fellas got ya fixed up

Yes it is!!! Thanks for everyone's help and thoughts!!!

 

[Nitehawk55]

Glad "we" found the problem !

Now take it out and safely give it a Mexican tune up to clean that carbon out .

 

[jakethesnake]

Rep for all involved.

I still have trouble believing I was wrong..........

LOL

Me too man me too

 

[Stihlbro]

Good luck and keep us posted on the outcome.

 

[paragonbuilder]

Rep for all involved.

I still have trouble believing I was wrong..........

LOL

I'm so freakin happy right now! You guys have no idea...
I would have thrown another $500 at it and still been like wtf! I didn't believe it would help... Lol... But I did it cuz I said I would... You guys are awesome!!! Thank you.

 

[paragonbuilder]

Glad "we" found the problem !

Now take it out and safely give it a Mexican tune up to clean that carbon out .

I know a few people had mentioned it so without looking back I'm super grateful and humbled that I was skeptical about this.

Just got to gut these cats now...

 

[Canadian farm boy]

I know a few people had mentioned it so without looking back I'm super grateful and humbled that I was skeptical about this.

Just got to gut these cats now...

I'm glad you found a problem.
Just to be safe I would replace to pre cat o2 sensor (they do become "lazy" as they age) I would also double check your fuel pressure. You mentioned having 60 psi at idle. That is around the minimum pressure spec for the vortec engines.

 

[Majorpayne]

I know a few people had mentioned it so without looking back I'm super grateful and humbled that I was skeptical about this.

Just got to gut these cats now...

Junkyard?

 

[Canadian farm boy]

With your fuel pressure gauge connected and the engine idling slowly pinch off your fuel return line. Don't pinch it off totally. You should see your fuel pressure begin to rise as you pinch of the return line.

 

[Canadian farm boy]

In my experience a plugged cat usually happens as a result of some other issue. Think of it like a saw running really rich and plugging the screens.

 

[paragonbuilder]

In my experience a plugged cat usually happens as a result of some other issue. Think of it like a saw running really rich and plugging the screens.

Yup! Just talked to my buddy at Napa. He said same thing. Probably running a little lean from low pressure caused it. But the question is was it the injection system which I replaced already right before this happened.
Also he says if you delete the cats, you can put a spark plug defouler on the secondary 02 sensor and it will usually prevent the codes.

 

[jeepsnchainsaws]

I know a few people had mentioned it so without looking back I'm super grateful and humbled that I was skeptical about this.

Just got to gut these cats now...

That's what I think... Just punch them through.

 

[Canadian farm boy]

Yup! Just talked to my buddy at Napa. He said same thing. Probably running a little lean from low pressure caused it. But the question is was it the injection system which I replaced already right before this happened.
Also he says if you delete the cats, you can put a spark plug defouler on the secondary 02 sensor and it will usually prevent the codes.

The low fuel pressure will cause the injectors to have a poor spray pattern( the fuel mist won't be as atomized). The fuel won't burn completely and you will get a lot of soot. Also a lazy pre cat o2 sensor will essentially call for extra fuel causing the engine to run rich. This too will make your exhaust overly sooty. Both these issues will cause poor performance and bad fuel economy.

 

[concretegrazer]

Glad you're getting somewhere. I haven't played with gassers in 15 years so I'm no help.

In my experience 9 out of 10 fuel pumps will just quit working all together but there is always that 1 that will still sorta work. I'm leaning towards you have that 1 just like I did.

& then there's the really odd duck. Had a friends 97 that wouldn't start but would run flawlessly. Still baffled at that one.

 

[super3]

That's why I'm reluctant to spend $250 on a pump. I've always seen them puke out completely...

F'in A on gettin somewhere.

Just for future reference... I just bought a new AC Delco pump/module off ebay for $105 shipped.

 

[paragonbuilder]

F'in A on gettin somewhere.

Just for future reference... I just bought a new AC Delco pump/module off ebay for $105 shipped.

Good to know! Thanks

 

[paragonbuilder]

The low fuel pressure will cause the injectors to have a poor spray pattern( the fuel mist won't be as atomized). The fuel won't burn completely and you will get a lot of soot. Also a lazy pre cat o2 sensor will essentially call for extra fuel causing the engine to run rich. This too will make your exhaust overly sooty. Both these issues will cause poor performance and bad fuel economy.

Once I get this exhaust sorted I'll look closer at the rest. I didn't want to dump any more money into it till I figured out the issue...
Now I'm pretty sure I can make it into a good running truck I don't mind spending a little money

 

[Nitehawk55]

I had a 97 chev pick up with the 4.3 , they are an awesome engine when running right and you can put a lot of miles on them .
5.7 Chev V8 with 2 cyls removed , simple design that worked well .

You'll likely get better performance and mileage that you didn't know it had .