ecu swap cams

neonjake27 · Post by **neonjake27** » Wed Sep 08, 2010 12:32 pm

ok i put a 97 2.4 head on my car and a t3t4 turbo can i use the 2.4 cams? will my computer read them? or do i have to switch to a rt computer?

esteinmaier · Post by **esteinmaier** » Wed Sep 08, 2010 1:06 pm

Just have to use the correct cam magnet at the correct orientation.

neonjake27 · Post by **neonjake27** » Wed Sep 08, 2010 2:00 pm

so 2.4 magnet wont work?

esteinmaier · Post by **esteinmaier** » Wed Sep 08, 2010 2:46 pm

On an LS3, no. On a focus, no. On a neon, maybe. What neon?

Fuzzyneon · Post by **Fuzzyneon** » Wed Sep 08, 2010 3:56 pm

just run 2.0 stock dohc cams little extra power and i think you just turn the cam magnet 90 degrees

esteinmaier · Post by **esteinmaier** » Wed Sep 08, 2010 4:43 pm

Depends. NGC, SBEC 2.0, SBEC 2.4, as well as either NGC, SBEC 2.0, and SBEC 2.4 cams.

neonjake27 · Post by **neonjake27** » Wed Sep 08, 2010 8:41 pm

ok i got a 2000 neon with the 2.4 head and cams. if i get 2.0 cams and throw em in i'll be fine?

esteinmaier · Post by **esteinmaier** » Wed Sep 08, 2010 9:23 pm

2.0 cams direct swap. 2.4 cams, grind off the locating dowels of the magnet and turn 90 degrees clockwise.

neonjake27 · Post by **neonjake27** » Thu Sep 09, 2010 10:00 am

ok i move the magnet 90 degrees. i used the sensor from the 97 stratus and it clipped right in is this right?

esteinmaier · Post by **esteinmaier** » Thu Sep 09, 2010 11:18 am

Speak English. I lost ya.

neonjake27 · Post by **neonjake27** » Thu Sep 09, 2010 11:27 am

i just moved the cam magnet 90 degress clockwise. but the sensor is from the 97 stratus and it clipped in to my connector on my harness. should i have gottn the same year sensor for my car? and i heard people talk about slicing the sensor in to the connector?

esteinmaier · Post by **esteinmaier** » Thu Sep 09, 2010 11:50 am

Wait. Are you saying that the cam position sensor doesn't connect to your harness? Then yes, obtain the one that does connect to your harness.

neonjake27 · Post by **neonjake27** » Thu Sep 09, 2010 11:59 am

it does but timing still seems to be off? im using stage ones and a rrfpr set to 10 lbs base. and it'll turn over but no fire like the timing is way out or something.

neonjake27 · Post by **neonjake27** » Thu Sep 09, 2010 2:18 pm

and i get huge backfires when cranking?

esteinmaier · Post by **esteinmaier** » Fri Sep 10, 2010 10:12 am

Did you invert the spark plug wires?

Fuzzyneon · Post by **Fuzzyneon** » Fri Sep 10, 2010 11:00 am

esteinmaier wrote:Did you invert the spark plug wires?

this is probably it

neonjake27 · Post by **neonjake27** » Fri Sep 10, 2010 12:14 pm

how do you invert spark plug wires? but anyways i took the valve cover off and saw the intake cam whole was staright down while the exhaust was straight up so i flipped the cam around now it runs! very poorly but i put a sohc magnet in also. it runs like it has a cam or somethin and it smokes alot.

esteinmaier · Post by **esteinmaier** » Fri Sep 10, 2010 1:47 pm

Wow, that's awesome. You had the cam exactly at the only place it could be out and not bend valves. Check your timing again. That's probably why it runs bad.

I was checking about the spark plug wires because it's one of the things you have to do to go 2.0 to 2.4 block, and figured you may have done it thinking it needed to happen with the head.

neonjake27 · Post by **neonjake27** » Sun Sep 12, 2010 1:15 pm

yeah i got 2 codes one is 0340 which is cam circuit malfunction. other is evap. but how do you think i should go about fixing this code? turning the magnet again?

Post by **racer12306** » Sun Sep 12, 2010 2:22 pm

Are you sure the cam position sensor is good? If it's used go out an grab a new one.

neonjake27 · Post by **neonjake27** » Sun Sep 12, 2010 3:08 pm

i think its good should i just get one for like a 97 neon dohc?

gtxtreme19 · Post by **gtxtreme19** » Sun Sep 12, 2010 3:12 pm

So wait this is confusing as hell... you did the 2.0 Dohc swap and want to use the 2.4 Cams?

neonjake27 · Post by **neonjake27** » Sun Sep 12, 2010 3:15 pm

i have a 2.0 sohc block with a 2.4 head on it

Post by **occasional demons** » Sun Sep 12, 2010 4:22 pm

He has the 2.4 head/cams, and needs to get the cam magnet in the proper location. I think the p0340 code will be set with the cam out of time, or in this case, if the magnet is not where it should be.

2.4 cams, grind off the locating dowels of the magnet and turn 90 degrees clockwise.

You have done this part?

I don't think a SOHC CPS will even bolt onto a DOHC head, so you prolly have the correct sensor.

As long as the cam is in time, it should run even with the magnet out of time. The magnet is more for the fuel timing, more than the spark. Once the PCM has the cam phase reference it knows which injector to fire. It is used somewhat at start up for the spark reference, but once running, it uses the crank signal for spark timing.

The fuel spray will just be lingering in the intake port for a partial to complete cycle before the valve opens and draws it in. It will just not be the best for low rpm running.

A lot of older systems, and some MS are batch injection, which essentially is the same scenario. Sequential multiport injection is more for a smoother idle, better low rpm response. Once the rpms come up, there is so little time between intake valves opening, that it is a non issue.

Did you have the head looked over before installing? Is the smoke dark, or light? Does it smell like coolant, fuel or burn't oil?

Edit:

neonjake27 wrote: turning the magnet again?

Double check the cam timing, and put the magnet in it's original position, then turn it clockwise 1/4 turn again, just to be sure it is correct. Use a marker to better eyeball it when turning.

neonjake27 · Post by **neonjake27** » Sun Sep 12, 2010 5:32 pm

light colored smoke, smells like oil.

Post by **occasional demons** » Sun Sep 12, 2010 10:33 pm

neonjake27 wrote:light colored smoke, smells like oil.

So I take it the head wasn't disassembled/checked for wear before installing?

Well if it wasn't doing it before the head swap, then the valve seals are prolly shot. Possibly valve guide wear also.

If the guides are worn, then new seals will be a waste of time. The valve stems moving around will wear out the seals in short order.

neonjake27 · Post by **neonjake27** » Mon Sep 13, 2010 11:38 am

i dissasembled it and put new seals in. the valves didnt seem loose in the guides when i was doing the seals.

Post by **occasional demons** » Mon Sep 13, 2010 12:32 pm

Hopefully it is just a damaged seal then. Once you get it running better, if it smokes more sitting and idling, then clears up once under way, it would be a valve seal. Rings will smoke more under acceleration, as well as idle. Or it could be just clearing out any residue from being reassembled.

neonjake27 · Post by **neonjake27** » Mon Sep 13, 2010 12:56 pm

ok so i turned the magnet 90 degress clockwise and still got code 0340? think i should of turned it counterclockwise?

Post by **occasional demons** » Mon Sep 13, 2010 10:18 pm

racer12306 wrote:Are you sure the cam position sensor is good? If it's used go out an grab a new one.

I think I would go with this advice at this point. IIRC, AZ's Duralast CPS's have a lifetime warranty, so you can't go wrong there.

Edit nevermind, just a two year warranty.

AutoZone CPS