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As for a general update I had the car starting but I was getting codes saying that the driver side exhaust cam sensor was failing. After probing the signal it was definitely working. The shop that was going to tune it hooked up to it and it said the cam phase was not shifting.
I checked all the wiring for power, opens, shorts, ground, ohms, EVERYTHING WAS FINE.... That leaves only a few things and they are all mechanical. Exhaust cam sprocket or the cam itself So I bought the replacement cam sprocket and cover from Z1 ( https://www.z1motorsports.com/camsha...ar-p-6314.html)
However... the holes on the back of the gears do not match. Working with Z1 to figure out what is going on or see if the dowel can be taken out of the cam and be ok.
Well... the issues continue. Turns out many years ago, someone put HR Cam gears into a RevUp... Yes they fit and worked.
The HR exhaust cam gears allow for 0-40 Deg of phase shift while the RevUp only allow for 0-30 Deg. If the ECU does not try to go further than 30 Deg, the only issue that could happen is the cam gear mechanically over shooting (in theory). Thus I dd not have any issues.
I ordered a driver side Exhaust Cam gear set which lead to finding out I had the wrong exhaust cams in the engine.
Once I put the main timing cover and oil pan back on... That is when I realized the cover that came with the gear was for the wrong side. I am working with the store I bought it from to just get the driver side like I originally needed. That way I can replace both HR gears with RevUp and maybe get some type of deal wince the wrong part was sent. Still working on that.
Maybe in a few more weeks I will put it all back together again and see what happens with both sides having stock exhaust cam gears.
Finally got everything put back together and changed both exhaust cam gears to OEM ones. Take two for the tune happens in three days. Hopefully they dont find anything else wrong....
Do you know what the adjustment on the cam gear does, is it a specific set for anything or to ensure correct timing between all 4 cams? I believe I have a set of the Z1's as well, as those are what mine look like.
The exhaust cam gears can change the phase of the exhaust cam on the fly relative to the intake cams. This allows for the higher rpms on the rev up motor.
The rev up motor can adjust up to 30 degrees of offset. The HR exhaust cam gears can adjust up to 40 degrees.
A regular DE does not have this feature.that is why you can run a rev up motor as a regular DE by leaving the extra sensors unplugged.
I get the degrees and variants of the gearsets, but the allen bolts on the back, do you know what they are for? I don't have an FSM on hand to see if it is covered.
Well now I have my Z up and running again, I had to use the revup heads on my 04. Yes there is zero wiring or anything additional for the revup type of swap you are doing. I am having a p0300 misfire code, did you ever run your engine without the new wiring additions? I need to get this car through emissions and would try anything for a temp solution. I've tried different coil packs, plugs, cleaned/replace injectors etc. The only two issues I think it may be are clogged cats or the exhaust cam timing messing with things at idle. thoughts?
Exactly, So I have jumped the cam phasers, and that seems to pull them back to where they should be at idle, at least one side. One seems to be either not wired to 1/2 pins or is open circuit. From what I can see, at idle it is 100% duty cycle tapering off as revs increase, so a constant 12v should be ok on that circuit.
Hmm.... Well from what I know, teh RevUp exhaust cams gears default to 0 Deg offset. If you have a complete RevUp motor and do not connect the front phasors or the rear cam sensors and use a DE ECU, the car runs as if it is a DE.
Same 04 ecu, I have tried to jump the exhaust cam phasers and it seems to bring the idle down to where it should be, but I still have a bad misfire. Between cleaning and swapping injectors, plugs and coils I'm a bit lost. Odds of it being clogged cats?
General update: Turns out the last time I put it together the dowel pin on one of the exhaust timing gears go pushed it. I thought it was set right but the Jim Wlf cams have a third hole that gave me a "false set" if you will.
Then once that was all put back together the rear timing cover decided to crack...
Finally go around to changing the rear timing cover (thanks Z1!) and putting it back together now. Won't know if I did everything right until I start it. Fingers crossed.
If it works, then its off to Up Rev to get tuned for real this time.
Well, I added a fuel return system and vacuum referenced fuel pressure regulator. We think my injectors are too big. They were not closing all the way under the higher pressure. I lowered the pressure to 40 psi. Runs much better.
It is currently at the tuner again to see if we can get it tuned for good this time.
03-10-2019, 06:59 PM
