Hey guys... I never paid too much attention to *have I blown my engine* threads, but I wish I would have. I'm not too sure if I have blown an apex or not..


A couple nights ago I was racing my bud's Firebird Formula 350, and as soon as I had caught up to him (took me 4th gear) and passed him, I got to less than 120 and my tach just SAT at 6K. I look over at my boost gauge, and my needle is.. hm... fluttering? It looked like someone was shaking the gauge. It is an Apex'i boost gauge, high quality... Well, I let off because I figured, ****! Whats going on? He passed me, and that was that.

Everything was smooth after that, just like normal.

Today I was driving home on a 3 hour trip, and I had to slow down because someone was braking in front of me and turning, and as I started to accelerate, the car started running really shitty, and my boost gauge needle was shaking ALL over. Like in boost, it would jump around a difference of 2 psi back and forth regardless of how much throttle I got.

My idle is extremely lumpy; it sounds like a diesel now. I have a crappy compression tester, and I got 1 big jump and 2 small ones on the front rotor... I don't have anything to tighten it too much. When I pulled the plug, and had someone crank, I had one big whoosh and 2 smaller ones. The 2 smaller ones don't seem as bad as my friend's NA that blew... if I remember correctly.

So what do you guys think?

Thanks..

 

Sounds like a seal to me. 1 chamber good, 2 chambers bad with cracked seal between.

 

It sounds to me like an apex seal broke. If yor car has about half its power, thats it for it. Did you BPU? what mods do you have?

 

I'm just wondering though, if it is directly related to the pressure spazzing, why would it go away for a little while, then come back (bigtime)?

 

my mods are in the sig.

Wellllllll........ it doesn't seem like HALF power, but its lower. What do you mean by BPU?

Now I never put an FCD on because I didn't want to lean out, but I've been hitting fuel cut. Too much. I think that the seal probably weakened from that... I tried not to hit it, but too much boost. I was about to send my puter in to get reprogrammed.

I am wondering if my injectors are not up to par. When the engine comes out I'm going to send them in.

Yuck..

 

We still dont know your mods ( your sig isnt anywhere ij this thread ).

 

here, sorry, forgot to check the box :|

 

That'll do it. Sorry to hear about your engine.

 

If the engine idles fine you probably cracked an apex seal. Happened to me. Hit 15 psi merging on a parkway and then lost power. Boost guage was fluttering. I was lucky I just cracked it cause I got power back but if I pushed it I would experience the hesitation and the fluttering guage. When you blow your engine you'll know. Mine idles around 400 rpms. The needle bounces between 5 and 8 of vacuum. Its a horrible feeling when engine goes.