Hey, I have a 96 blazer with 113k with the 4.3. I just got a replacement spider off ebay from a wreck and installed it the other day for 90 bucks. Before, I was having a problem when driving in high gears. At times, the engine would buck and lurch for a few seconds and during that time, the E-Brake light and the ABS light would come on then go off after the few seconds of bucking was over. If the bucking was bad enough, the engine would die completely. I thought that maybe the engine was beginning to stall and the lights were flashing on for this reason. I took the upper intake off and it was very wet and nasty and brown around the poppets and such. I replaced the spider hoping it would fix the problem. Driving the other day, the bucking came back but it did not stall. I've replaced the TPS, EGR, distributer cap and rotor, all 4 oxygen sensors, and a good amount of other things as well. The service engine light also comes and goes with similar codes such as TPS and the occasional oxygen sensor. Does anyone have any thoughts on this???

 

any ideas? bump

 

Start by listing the specific codes you are getting. Then look in the Tech Article (DIY) section for the trouble shooting of those codes rather than replacing parts that come to light based on the title of the code...

 

well as of right now, the truck isnt throwing any codes at all. That's the issue. It'll turn on the ABS and Ebrake Light for a few seconds while it does the bucking and then the lights will turn off. this happens regardless if the service engine light is on or not.


The most recent codes I read were : PO446, P01406, and P0122
This was right before I replaced the spider.