1994 Internal Fuel Lines

All,

I am currently replacing a bad CPI unit in my 1994 S10 Blazer. I went ahead and got the two fuel lines to replace also since I will be able to get to those once I get to the CPI spider.

The quick question is...looking through my Chiltons book, it does not give much detail on how to replace these fuel lines.

Does anyone have any experience with these that would be able to give me a rundown on the replacement procedure?


Much Thanks!!!

Skeeter6755

I guess I have a couple more questions.

1.) I know how to take off the plenum cover, but how would you remove the bottom part also? I want to clean it well, so I want to remove all of it to do so.

2.) Is there a specific torque sequence when you reinstall the plenum cover? I have heard somewhere that there is a specific order you have to follow, but have not been able to find any information.


Thanks again!!

Skeeter6755

Thanks for the heads up skeeter-hopefully someone will figure something they can use from my short problems. Mines to old to help you-did you every figure out the answers to you fuel line questions?
Hecksterz

I guess I have a couple more questions.

1.) I know how to take off the plenum cover, but how would you remove the bottom part also? I want to clean it well, so I want to remove all of it to do so.

2.) Is there a specific torque sequence when you reinstall the plenum cover? I have heard somewhere that there is a specific order you have to follow, but have not been able to find any information.


Thanks again!!

Skeeter6755

I would say, if I were doing the job, not to remove the bottom intake. You should be able to use rags and 2+2 to clean the build-up. You should be able to clean it relatively well. However, since you have the upper plenum off, give the throttle body a real good douching to include the removal of the IAC.

Since you have a Chilton's, it should give you a torque sequence and at least a torque spec. In the event there is no sequence, always start at the middle and work your way out, jumping from side to side. And remember when you replace the plenum gasket, red side up.

As to the nut kit, remove the old spider, remove the old nut kit and then install the nut kit and the spider last. The nut kit can be a little, should I say painstaking? It can be a little tight up against the firewall. But it will be a job well done when you are finished.

Thanks for your information. I will give it a try and let you know what happens :)

What a pain!!

I got it done though...but just a couple of my comments:

The nut kit was way harder to do than the CPI injector itself. After fighting with the bracket that supports the fuel lines, I found that the plastic pieces had cracks in them.

After I replaced those everything went smooth. Also, I found that the hole for the EGR valve had so much carbon build-up that only a needle would fit through it...so I cleaned that out also.

Now that all of that is done, it would probably be a good thing to do an oil change, and change the spark plugs right?

What about this seafoam I read about? Should I also put that in my oil also after all the above has been done to clean out the remaining carbon deposits?

Much thanks!!!!

Skeeter6755

What a pain!!

I got it done though...but just a couple of my comments:

The nut kit was way harder to do than the CPI injector itself. After fighting with the bracket that supports the fuel lines, I found that the plastic pieces had cracks in them.

After I replaced those everything went smooth. Also, I found that the hole for the EGR valve had so much carbon build-up that only a needle would fit through it...so I cleaned that out also.

Now that all of that is done, it would probably be a good thing to do an oil change, and change the spark plugs right?

What about this seafoam I read about? Should I also put that in my oil also after all the above has been done to clean out the remaining carbon deposits?

Much thanks!!!!

Skeeter6755

LMAO,,,, Didn't want to tell you how tough it was, didn't want to discourage you but congrats! Bet you feel a sense of accomplishment!

Changing out the plugs and doing the oil is never a bad idea, especially if you were washing. Can't tell you about the seafoam, never used it.

Change the oil ASAP and don't use a Fram oil filter.

Plug change would be good but don't bother with the seafoam because it will fiul your new plugs up.

Trust me, it fouled mine.