I bought a 98 4x4 blazer a year ago. All was great. Then one morning I went to start it and it was running like crap! It stutters, stalls out when at stop lights, is sucking gas like crazy, and now has very slow acceleration. I took it to auto zone and a friend and the only code that came up with both was a cylinder 4 misfire but ALL plugs and wires have been changed and rechecked. I don't know what I do and have already put so much money into this truck I need to just fix it already! Any ideas will be very much appreciated!!!

 

Not to sound negative when you get fixed whats wrong with it,Wash and wax,detail slap the largest brightest 4sale sign you can find.Thing is Im not joking you be hundreds time happier when its gone knowing how much $ you saved in maintance

 

You might have a clogged injector/s. Upgrading to MFI helps but costs atleast 175. It is also a good time to change out your intake manifold gaskets which will fail if they havent been replaced already. Might wanna take a look at you distributor cap and rotor as well.

 

Do a fuel pressure and leakdown test. Instructions are available here on the Forum. That's always a good first step for diagnosing Blazer problems.

 

Did the '98 year still have an EGR valve? If so, take it out, probably find a chunk of carbon in the valve keeping it from closing. Clean the intake passages and EGR, reinstall. $0 fix.

 

+1 Lanny and jimmyowner