Engine issue, can any of the guru's help?

[gogsie]

Long story short I managed to over rev my engine when I selected 1st instead of 3rd ( don't ask). I'm not sure why but now the car seems to be missing very slightly, It idles fine and still runs good but just feels like there's a slight missfire now.

Anyone had this before/know what it could be.

I'm running ITB's & Omex ecu loom everything else is standard.

 

[Fred@BTM]

ooops, couldve clipped a valve and bent something, broken a rocker etc

 

[gogsie]

Mmm I was hoping it wasn't internal but I think it could be.

Head off to inspect is the only option is it?.

 

[sophiesdad]

cylinder leak test should help with diagnosis.

 

[sideways danny]

ouch, most likely is you've had a bit of valve bounce and clipped the pistons. Compression and leak down tests as said would give you an idea. There's also the slight possibilty of one of the cam pulleys having slipped slightly, but i'd make that a secondary thing to look at

 

[gogsie]

Compression checked as follows

1 = 115psi
2 = 115psi
3 = 130psi
4 = 135psi

Is this healthy enough?.

 

[sideways danny]

no thats well down. I'd want to see 170psi or more.

 

[Fred@BTM]

no, thats knackered, 180psi+ is normal

 

[gogsie]

Oh dear, it's strange as it seem to be running fine and like I said doesn't feel like it's down on power.

So what's causing the low readings? Is it new engine time?

Does it matter if the engine is cold when I tested it?

 

[sideways danny]

you will normally see a bit of a difference between hot and cold

It's also important to disconnect the injectors, and to do the test with the throttle wide open

 

[gogsie]

FLOL I'm a prize knobber!. Did the test the RIGHT way this time and the results are
1 = 210psi
2 = 210psi
3 = 205psi
4 = 205psi

Ah I can breath again just!!
Let the slagging commence.

 

[Fred@BTM]

i want to know how you did it wrong!

 

[sideways danny]

closed throttle...... not something you have to mention on a standard inlet becuase the inlet is removed anyway.

 

[Sam@NP]

Will your Omex not give out fault codes?

 

[gogsie]

Yeah I had the injectors connected and never touched the throttle!.

 

[gogsie]

Will your Omex not give out fault codes?

Not sure but that's my next step if it does.