ok i have a 1988 vert, i just installed a racing beat header that the collecter was cut off of, with nothing else(the duel stright pipe job is getting done this week) and i was driving is around(loud as hell) and alls i removed from the emissions system was the exhaust, air pipe, and the 5th and 6th acuators. well it ran fine with no problems. well today i went back and removed the anti after burn valve(the part between the 5th and 6th acuators, and put on the block off plate. well the idle was a little rough and i took it for a test drive and as i was crusing the car was cutting out like a fuel cut or something, then i decided to take it to redline and i went thru 1st an 2nd and as soon as it hit 5k 5 1/2 k it cut, it just felt like the fuel stoped going in the engine. i have no clue why its doing this any help is appreacited.
thanks

 

It could be that you didn't get is sealed properly and it created a vac leak. I'm not 100% sure that can cause a vac leak, but it seems like it could. Wait for someone else to chime in before doing anything though.

 

thanks for sugest

 

Most likely a vacuum leak. Did you put any sort of gasket maker around the blockoff plate?

 

and did you wire open the ports or just remove the actuators?

 

i didnt put any gasket sealer on the plate, and i wired the ports open(i think) i wired them towards the ground.
the two hoses that run to the air pipe to the main cat are open, but it didnt act up till i put the block oof plate on
i guess ill try the gasket sealer, what kind should i use??

 

RTV Ultra Black, or Hylomar.


ALWAYS use a sealer on block-off plates. Don't apply it directly to the plate..put it on the surface the plate goes onto, on all flat surfaces.

 

thanks for the info evryone it was a vac leak due to no gasket seal. i fixed it and then swaped out my old fuel filter for a new one. tomorrow the cars going to the exhaust shop first thing in the morning to get its straight pipe and mufflers put on. i cant wait ohh and a new o2 sensor.