Hi guys,

I don't know how to describe my problem.

First, I'm german, so please be patient and correct me, when I use the wrong words.

I start with the car. It's a 1995 S10 Blazer with the VIN W Engine and 4x4. Should be an CMFI.


I can start the engine, but in N, R and D the RPM goes up and down, and often almost dying. When push the Gas Pedal down the engine accelerates, but during the rising of the RPM it hesitates. I made two vids, of it, so I hope it can describe the Problem better than me.

It seems to be better in N, and P/D is pretty bad.

https://youtu.be/oxJJbj1wtHc

https://youtu.be/2I78RbfCpnU


replaced the IAC, TPS, Oxigen Sensors, coolant temperatur Sensors, Crankshaft and Camshaft Positioning Sensors. Next Step is the Injection Spider, and the hoses.

Fuel pressure is a little low, but still in normal region.



I would be really thankful for your help with this Problem, because in germany is no Mechanic, who can fix it.


And the last thing is the question, what are these parts with the hose? They are mounted on the drivers side of the Intake Plenum.







Thanks for your help.

 

Mostly this happen when you have bad injectors. Did you check the spark plugs to know if it run with rich or lean of fuel.

 

Hi. Today I replaced the injectors and fuel lines, but the Problem stays the same. Monday I will change the MAP-Sensor.

 

So, I've got an Update. On monday I replaced the MAP-Sensor without any changes.
So I replaced the Crankshaft Positioning Sensor Ian have seen some scratches caused by the wheel inside of the Timing Chain Cover.



I measured the depth of the scratches and made a shim, 1mm between Sensor and Timing Chain Cover.

Now the Blazer runs good. Soon I will replace the old sensor with a new one.