To a point, Natan is correct. Over 100rwhp and they start to have issues - hammer it in a low gear with sticky tires on and you can peel the teeth off the gears like a cob of corn. Will Neely's 733rwhp monster ran into this problem.
There are lots of clutch choices for this, ACT, RPS, Tilton...
Do the usual bit - unplug one spark plug wire, start it up, check for tapping.
Repeat with each wire.
If the tapping goes away, the cylinder that is disconnected is suffering from rod knock.
Ya, except for the fact that he has (I think) 2 x 720cc injectors running to a separate fuel pump and fuel cell, holding C16 where the spare tire used to be. :D
Damn - yours looks like a much more even drop, mine looks lower in the rear than it is in the front. Is it just the angle, or did yours drop nice and even?
JJ, you are the whole reason I'm going to try it this way - before I read some of your posts on this subject, I was under the impression that the ECU monitored the heater circuit! :)
I'm not concerned about falling out of closed loop, as I'll be feeding the signal from a wideband whenever the...
More than a day's work.
You need to tear the head off, take it apart, and send it into a machine shop to be surfaced flat. That's a day.
While waiting for the machine shop, clean the block deck and examine it with a machinist's straightedge to make sure it's flat, and order a new head gasket...
The reason I'm researching this is because I'm replacing the stock O2 with a wideband, and the output from the wideband to the ECU is only a single wire.
So, the question then is, do we just leave the heater wires disconnected, or do we need to wire in a resistor, or do we need to do something...
Troubleshooting that front VSV is EASY. Just wait until the engine has cooled after running for a bit - 30-60min should do the trick - pop the hood and pull the vacuum line off the FPR, right beside the oil cap.
Then try to start the car. If it starts easy, the VSV is toast.
Put the vacuum...
The fuel pressure VSV is only used on warm startup. On warm startup, it switches the FPR to use atmospheric pressure instead of manifold pressure to combat heat soak.
Removing it might make your engine harder to start when warm, that's about it.
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