Hi everyone. I am having one hell of a time trying to figure this out. I should also add this a 1992 Honda Prelude with a built H22 on boost. So I changed my plugs the other day and went out for a 30 min drive. I did a couple pulls here and there, but nothing crazy. As I was on my way back into town, I came to a stop sign. I accelerated away normally in 1st and through 2nd gear. I was building a little bit of boost in 2nd, and just as I shifted into 3rd the BOV made a much different sound than normal.

As I was driving down the road I noticed my AFR was in the 11's cruising. As soon as I would touch the gas it would go off the scale rich. I tried accelerating a little more after that and it sounds like turbo surge, and that the car is not making boost. I don't know if any of you have ever experienced what a boosted car drives like with a clogged cat, but this is exactly what it is like to me. The car does nothing. I am also running 11.5 AFR at idle.

So I talked to a couple people and they said it could be a single injector is pooched. That could be the reason why it is running so rich. So I pull my injectors out and take them to a local shop to have them cleaned and flow tested. They worked perfectly. I put them back in the car, and sure enough the same issue.

So next I do a compression test. That comes up 185 185 170 185. The one cylinder is down a little bit, but nothing to be worried about.

Next I test for spark. All good there. Could it be do to weak spark?

I tried my best to source out a possible vacuum leak, and I couldn't find anything either. I also checked if my couplers on the charge pipes possibly blew off, and nothing.

I am all out of ideas right now. This car has been mint for 4 seasons boosted, and now into my 5th season, everything is going wrong.

Any ideas are greatly appreciated. Thank you for your time.

 

do a boost leak test to rule that out.

 

^Ya a pressure test is my next step, but even if there was a boost leak, the AFR should not change.

 

did you end up doing the pressure test???
What were the results, im having a similar issue.

 

They would change since the tune is getting thrown off its dumping in fuel and its getting no air. Which will make it rich. Do a boost leak. And check the turbo

 

check your blow off valve to see if the diaphragm is ripped.

 

what is your map sensor reading when you are at idle? I bet a vaccume hose blew off. and the map sensor is sitting at atmospheric pressure..

 

^I checked the map sensor vacuum line as well, and it is still on there.

Yes if the car was under load, but at idle they would not change.

I still have to do the pressure test when I have time.

Thanks to everyone that has given me tips so far. I appreciate it.

 

Turbo is toast. Thanks everyone for your help.