Won't start

[Shaker.Est.84]

I have a 1997 GMC Yukon SLE 2 Door. The truck was starting and running just fine no it will only turn over then acts like something slows down the starter.

 

The weather was really mild today with rain. http://cloud.tapatalk.com/s/5a78d0e51786b/20180205_173743.mp4

 

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[Logan Lanfear]

Sounds like it can be electrical.  Check all battery connections and battery voltage.  Then check fuel pressure and see if the pump is working correctly.  Pretty clean rig by the looks of it.  Is it throwing any codes?

[Shaker.Est.84]

Thanks. Yeah its pretty good. I bought it in Vancouver BC, Its originally from Airzona and then I Drove it from BC to NB.

Lots of Miles on it and the engine is getting tired I know. This past fall I replaced the Pump and Assembly, Fuel Filter, Fuel Pressure Valve in the Intake on the Spider Injector System.

It needs O2 sensors but that is the only code showing up.

I am going to see if boosting it will start it.

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[Shaker.Est.84]

Just need to get another year out of it until I am ready to swap in a LS Based engine.

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[steelhead_steve]

I have a 1997 GMC Yukon SLE 2 Door. The truck was starting and running just fine no it will only turn over then acts like something slows down the starter.
 
The weather was really mild today with rain. http://cloud.tapatalk.com/s/5a78d0e51786b/20180205_173743.mp4
 
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Did you check for a good spark.
These rigs run if they have a good spark

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[O_J_Simpson]

I would load check the battery and remove that gray pubic hair from the instrument cluster.

[Shaker.Est.84]

I would load check the battery and remove that gray pubic hair from the instrument cluster.

Haha. Dog Hair from my Husky. I'll check the battery, Its less than a year old from NAPA

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[2018GMC]

You can get new o2 sensors from rock auto. Much cheaper than local auto store. If the 350 Feels down on power you may have clogged Catalytic converters. If they look original then replace them anyway with that mileage. I put a flow master high flow cat kit on my 350 with 4 new o2 sensors. Felt a noticeable difference. Then had computer mail order tuned by blackbear performance. Felt a big difference. Removed all torque management and firmed up trans shifts. Definitely recommend. And my 350 has 210k on it lol

 

‘Front o2 sensors before cats closest to engine control fuel mixture, rear o2 sensors after cats tell you if your cat is clogged or not working (emissions) 

 

Just saying if 350 doesn’t burn oil but feels slow, you have some options. 

 

Btw nice 2 door yukon. Those are becoming a rarity. 

[2018GMC]

Back on topic. Check the battery connections for corrosion. Check the main negative grounds for corrosion (battery to engine, engine to frame)

 

Does it use coolant? 96-98 vortec famous for leaky intake manifold gaskets. You cold have coolant filling up a cylinder and causing hard cranking. 

[Dnt]

Pull the wire on the AC compressor and retry. Bad compressor can lock it up completely or cause a real slow turnover. Would not be the first time this has happened, I changed a starter out one time because of this issue. Something that you NEVER forget LOL 

[Dnt]

Might want to be real careful coming out that door on your crib there!!!!! That first step looks like it could be painful........... 

 

 

 

[Shaker.Est.84]

I'm going to pull the spark plugs and see if there is any fluid. The oil is still oil and doesn't look like a B52 Mudslide.

I'll try the AC connections to see if that does anything. I've got a spare Tie Fighter Ac delete pulley from a previous build of needed.

Other things I've done are Blistien Shocks all around, drilled and slotted rotors up front, General AT2 Tires, Alternator, Rancho Steering Stabilizer, Roof rack, Muffler but I do plan on doing the whole exhaust because like started the cats have probably clogged up.

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[Shaker.Est.84]

Oh and you should limber up before exiting through the front door. Snow isn't deep enough for a soft landing.

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[2018GMC]

Here’s the high flow cat system with larger diameter pipe and better flowing bends than the restrictive stock design. Of course double check vehicle fitament. 

 

https://www.amazon.com/Flowmaster-2010023-Direct-Catalytic-Converter

[Shaker.Est.84]

All better running great. Old fuel gauge, New fuel pump and Short term memory loss. Haha fuel in the tank makes all things better. Thanks for the help

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