Hello,

I just bought a 95 Blazer 4.3 4x4

It ran fine yesterday, this morning I went out and took my wife to work, and it was fine for about 10 min drive, then it started to feel like it lost some power?

When I got to her work I put it in park, and it ran rough? But did not stale.
So I came right home, and parked in the drive way and it will idle but very rough,then I shut the engine down, and then tried to restart, but just rolls over and try's to catch, it will after trying it 3-4 times, then it just idles super rough.

Does anyone have any ideas? Thanks a lot.

 

Ok, I been playing around with it all day, I think it may have found the problem? I took of the wire going to the "EGR" valve, and started it up, ran good, but idle very high, Then I put the wire back on, and it seem to idel/run a lot better, I did not get the valve off because the bolt is stripped, I will try again to get it off and clean it, I just want to hear from you guys if that sounds like what my problem is?

Thanks again.

 

A malfunctioning or dirty EGR could cause the problems you describe. Normally it will set a code and cause your check engine light to come on. I had a dirty EGR on mine a while back and caused the same symptoms as yours. I was able to clean it up and has worked fine since. You should probably use the search feature of this forum to get some more info on EGR's. i recall reading about a new gasket or screen that helps prevent the EGR from getting as dirty.

Good luck and let us know what you find out.

 

I will try that, thanks a lot.

 

OK, it seem to be running fine now. I am not sure but I think its under powered? Its a 4.3 I am not sure how they are supposed to work, but it seem under powered? I thought it would have more pep?

 

By running better now, did the problem go away on it's own or did you repair/clean the EGR?

In regard to power, I guess the only way to find out for sure is to find a friend or someone who has a Blazer/Jimmy and compare yours to it.
I've never felt these rigs are great at acceleration but have a lot of torque for towing and hauling....that seems to be where they do better.

Also, if you recently bought this, do you know it's repair history? Maybe a tune-up/filters etc....are in order.

 

I cleaned the EGR valve, and put some throttle body cleaner through it.

I bought it from the original owner, who has had all receipts from new. I will try and see if I know anyone who has a blazer, it seems to have not a whole lot of power if I tramp on it, but maybe its just me?

 

Mine seems slow to me- especially at part throttle acceleration. It still surprises me though when I floor it. It seems a lot quicker than when just putting around. This is the first vehicle I have had that's not a V8 though. If you recently got it I would go through and just do a basic tune up on it- plugs/wires, cap/rotor, fuel filter, change fluids, etc unless you know when they were done last.

 

My 96& 97 seemed slow to me as well-all components were fine! Then I did the math: A 4500 lb vehicle with a GU6 axle (3:42) a 0-60 time of 15-18 was not unusual at all!
I actually weighed my unit with full cargo and find that the consistant 19-25 mpg is great and I have great go when I need it-but full throttle IS necessary in some situations. Each tank delivers at least 20+ mpg on 89 & Marvel oil