95 Blazer loss of power

[More1951]

Originally Posted by BlazerLT

You see where the metal inside has been washed clean? You need to replace your CPI injector and the nut kit.

That is the cause of your performance problem.

Excuse my for this question: the injectors are inside the body of the Nut Kit? (named “spider” in my city). Thank you

Oh!., This question was previous to your last answer. You had been advanced to the answer. I understood your technical instruction perfectly. The black deposits are relatively "normal" and the areas where the surface are cleans indicate that there is a loss of fuel for the system. I already saw your pictures and instructions in http://www.s10forum.com/forum/showt...cpi+replacement.
A thousand thank you.

[BlazerLT]

No problem.

As you will see in the link I gave you, you will see the new white lines which supply fuel to the injector. These are called the "Nut Kit".

The CPI injector is called the spider.

Replace both and make sure your mechanic cleans that EGR port that I showed you in that link.

What you will need to replace:

CPI Injector (spider)
Nut kit
Upper plenum gasket (don't reuse the old one)

Also, change your oil as soon as possible. The fue leaking out of the injector will go into the oil which will thin it out and cause oil related bearing damage.

[More1951]

Ok, BlazerLT. Everything understood.
Alone that the pieces are quite expensive in my country; for example, the CPI (spider) it is difficult to get and it costs between 450 and 650 dollars, and the hoses (white as those of your car) are not gotten.

On purpose, the mechanic carried out the verification indicated in your link with the old kit that is still installed, opening the switch and indeed there is leak of fuel. The exact place of the leak was difficult to observe with the installed kit, seemingly it is between the regulator and the body of the spider or possibly for some of the hoses of the injectors, in the place where they emerge of the body of the spider, but there is not leak properly for the hole of the end of the regulator.

I am in the process of getting the pieces for the repair. I will change the oil, the oil filter and the upper plenum gasket (¿Is the upper plenum the same dynamic chamber?).
Thank you.

[BlazerLT]

Is the upper plenum the same dynamic chamber?).

I don't know what you are asking, please clarify.

[wolfox]

Perhaps by "Dynamic Chamber" he means if the upper plenum icorporates the IMTV?

[More1951]

Originally Posted by BlazerLT

I don't know what you are asking, please clarify.

Ok. It is not very important. I meant that the compartment where are the injectors and the Nut Kit is called the “dynamic chamber” by the mechanic and I wanted to know if it is the same thing the "upper plenum". Thank you

[rlith]

Originally Posted by More1951

Ok. It is not very important. I meant that the compartment where are the injectors and the Nut Kit is called the “dynamic chamber” by the mechanic and I wanted to know if it is the same thing the "upper plenum". Thank you

Yes

[More1951]

Repairs and changes carried out:
Was replaced the CPI, Nut Kit, gasket, motor oil, filter oil, distributor rotor and spark plugs.
Now the engine responds with the appropriate power.
However, the engine presents irregularity in the minimum march (ralenti) and also when it ascends around 2000 rpm; seemingly as if a spark plug didn't work, but the spark plugs and the wires work correctly.
The mechanic cleaned carefully and correctly the surface of the upper plenum and he installed the gasket but he didn't apply it seal and I have the impression that air can be entering for the assembly. (The box of the new gasket contains a seal tube). What do you think about that?
Thank you

Oh!., as you can observe in the picture that I sent (link below), this engine doesn't have EGR valve; where the EGR valve should be, there is a cover with two screws. Anyway, the hole was cleaned completely.
http://files.automotiveforums.com/ga...hp?photo=45100

[blazee]

Link to picture doesn't work. Here's the pic:

[More1951]

Thank you blazee for your help. I already corrected the link to picture.

[rlith]

Originally Posted by More1951

Repairs and changes carried out:
Was replaced the CPI, Nut Kit, gasket, motor oil, filter oil and spark plugs.
Now the engine responds with the appropriate power.
However, the engine presents irregularity in the minimum march (ralenti) and also when it ascends around 2000 rpm; seemingly as if a spark plug didn't work, but the spark plugs and the wires work correctly.
The mechanic cleaned carefully and correctly the surface of the upper plenum and he installed the gasket but he didn't apply it seal and I have the impression that air can be entering for the assembly. (The box of the new gasket contains a seal tube). What do you think about that?
Thank you

Oh!., as you can observe in the picture that I sent (link below), this engine doesn't have EGR valve; where the EGR valve should be, there is a cover with two screws. Anyway, the hole was cleaned completely.
http://files.automotiveforums.com/ga...hp?photo=45100

Unless the EGR was deleted from the ECM (unlikely) that may be causing your stumbling acceleration.... The egr is there for a reason. You can restrict it, but it shouldn't be removed!

[More1951]

Originally Posted by rlith

Unless the EGR was deleted from the ECM (unlikely) that may be causing your stumbling acceleration.... The egr is there for a reason. You can restrict it, but it shouldn't be removed!

This absence of EGR is original of factory of the vehicle. It has not been altered.

[rlith]

I've never seen a CPI engine without an EGR manufactured for canada or the US...

[More1951]

This vehicle is originally assembling in Venezuela and import to Colombia.
Please: Which is the torque of the screws of the upper plenum?. Does the upper plenum gasket need seal? Thank you

[rlith]

8 ft pounds torque in a circular (not cross) pattern. Start at 7 o'clock and work your way around. No, the gasket doesn't need sealent. Just drop the gasket on and tighten bolts.