95 Blazer loss of power

[More1951]

I have a Blazer S 10 model 95, motor Vortec 4.3 LT that had the following problems: irregularity in the RPM; turn off during the march and it didn't start sometimes. The gas pump was changed when finding it low pressure. Now with the new gas pump and the new gas filter, frequently the motor doesn't respond with the correct power when hurrying; it ascends up to 3000 RPM or less and doesn't acquire power or acceleration, but previously it was working correctly and later it works correctly again, although it follows presented irregularity in the RPM. Injectors neither CPI or Nut kit have not been revised. The new gas pump is: AIRTEC NUMBER CATALOG E3270. What can I make? Please help me.

[rlith]

I would look to the CPI and nut kit

[BlazerLT]

yip, remove your top vortec name plate and the round IMTV valve underneath it.

Then take a flashlight, shine it down the hole and look for the smell of gas, pools of fuel and washed spots that will be a golden color.

[Cherid]

We had a similar problem with our 95 Blazer and it turned out to be the Catalytic Converter. My Husband replaced it and it runs great!!!

[Minkles]

Originally Posted by More1951

I have a Blazer S 10 model 95, motor Vortec 4.3 LT that had the following problems: irregularity in the RPM; turn off during the march and it didn't start sometimes. The gas pump was changed when finding it low pressure. Now with the new gas pump and the new gas filter, frequently the motor doesn't respond with the correct power when hurrying; it ascends up to 3000 RPM or less and doesn't acquire power or acceleration, but previously it was working correctly and later it works correctly again, although it follows presented irregularity in the RPM. Injectors neither CPI or Nut kit have not been revised. The new gas pump is: AIRTEC NUMBER CATALOG E3270. What can I make? Please help me

Have you checked your spark plug wires? check your injectors and also you might have a bad inlet manifold gasket. I would recommend you install and original AC pump.

[More1951]

Thank you for your answers to rlith, BlazerLT, Cherid and Minkles. Work carried out: The mechanic retired the top vortec name plate, but later he also preferred to move away the entire cover of the “dynamic camera” to observe the Nut Kit and the CPI. The interior of the cover of the camera where is the valve butterfly of entrance of air and the whole internal surface of the camera where is the Nut Kit and the CPI presents great quantity of black deposits stuck to the metal and the whole surface of the Nut Kit and of the entrance hoses and exit of fuel. I will take a picture to send it. The six circular conduits that go to the combustion cameras also present the black deposits and additionally there is a layer of oil on the whole surface (the vehicle has been consuming oil in remarkable quantity and does it leave blue-white smoke when it start up in the morning). Is it possible that additionally there is a problem of guides of valves?. Or of rings?. With which product should be cleaned the black deposits?, The mechanic has proven to clean the interior of the cover with the product of 3M “Throttle plate & Carb Cleaner” with good result. Is this product correct for it? How to avoid that the dirt passes to the combustion cameras? Can it retire completely the Nut Kit to clean it? Should the gasket be changed when reinstalling the pieces? Can a seal be used on the gasket? How many injectors does have this motor? How are the injectors regulated so that it consummates less combustible?. Excuse me for so many questions but I desire to conserve this excellent vehicle. Thanks to all.

[BlazerLT]

so there is no washed clean spots with metal exposed?

[More1951]

Dear BlazerLT
I believe that I didn't understand their question well. The interior stains, where are CPI and Nut Kit not have been washed yet. The test of cleaning carried out in small parts of the cover with the 3M “Throttle plate & Carb Cleaner” result in a complete cleaning of those small parts.

[BlazerLT]

Originally Posted by More1951

Dear BlazerLT
I believe that I didn't understand their question well. The stains not yet have been washed.

No, what I meant was there any leaking gas in the plenum causing the black stuff to wash off in areas.

[More1951]

OK, Understood. The cause of the black material is escape of gasoline. Do you suggests that it can be faulty of the Nut Kit or to have escape for some of the hoses?. What can you comment me about the presence of oil in the compartment? Thank

[BlazerLT]

No, if you have an injector leak, some of that black soot in the upper plenum will be washed off in areas.

Is the inside complete covered with black soot? No clean areas?

[More1951]

I send a picture:
Superior view of the compartment of CPI and Nut Kit of Blazer 95 with black deposits.

http://files.automotiveforums.com/ga...hp?photo=45100

[BlazerLT]

Originally Posted by More1951

http://files.automotiveforums.com/ga...hp?photo=45100

Superior view of the compartment of CPI and Nut Kit of Blazer 95 with black deposits.

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.

[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.

Understood totally. Thank you for your answer. I will inform you of the results. Thank you.

[BlazerLT]

Originally Posted by More1951

Understood totally. Thank you for their answer. I will inform you of the results. Thank you.

You do know what I am talking about right?

The injector is the whole assembly.

Here is where you can see when I replaced mine:

http://www.s10forum.com/forum/showth...pi+replacement