Rb25det cam angle sensor problems, and the symptoms

[perkeset]

let me know if any of you have had this kind of thing happen to you. i was driving my rb25det powered s13 to work on the 4th of july no less when my car just died. felt like timing sooo. . . i replaced the timing belt with a greddy and checked over the whole engine. everything was right but still would not start. next we thought it may be a dead ecu had an extra one so tried that still would not go it would crank fine but never start it would on occasion backfire. so finally my buddy (who has an R34 GTR) told me about the same thing happening to him and filled me in on what the problem acctually was. once i got a new cam angle sensor the car cranked right back up and i have been in boost heaven since. these are the symptoms :-crank but not start-feels like timing is off -seems like no fuel-seems like no spark -after about 10sec of cranking very very loud back fire well i hope this gets some people out of a hard place oh and scince i got it running again. i have one kill to report a ferrari 355 god i love my car!

my car 1993 s13 HB rb25det DYNO 331rwhp/312TQ

[S13 240SX]

yeah i been having those same problems and signs for a long time now.. I replaced the cam angle sensor once and it started but still it would run like crap and then out of no where it stopped starting again on the replacement number 2 cam angle sensor..

so seems like i may have to replace the cam angle sensor again for the third time. : (

[Coolwhip]

yea rule of thumb if: you lose more than one of the 3 vitals spontaniously (fuel, timing, spark, *air) its usually is a Computer or a crank or cam angle sensor.

[perkeset]

ohh that sucks man hope you can find one for cheap the company top hat preformance sells used ones pretty cheap. hope you get up and running again soon.-perkeset

[25ltr]

I've had this happen too. Another thing to look out for is the pin that sits on the back of the inlet cam gear, that holds the intake cam in place. It can snap. it's a factory part, and I don't know of any aftermarket company that makes one.

[HxC_Nismo]

this has happend to my friends s13 rb26 and it fixed it, its what sends signal to fire the coils

[Fearsome_tea]

Take the CAS of leaving it pluged in then turn the key to the on position. Turn the CAS by hand and you sould here clicking of the injectors.

[perkeset]

thats how we acctually tested that is was the CAS.

[Coolwhip]

I have one for sale

[74260zt]

I have one for sale

How much you want for yours?

BTW... some a$$hat is selling a used one for $225 on ebay right now....

[perkeset]

my buddy at redline performance got me one for pretty cheap. i will ask him if he can get more, mine was 150$ let me know if you still need one.

perkeset

[theonlyhamish]

hii need advice, i recently boiled my engine on my skyline r33 gts-t when the fan belt snapped. it cost me 2 grand to fix it,when i got it back 2 of my tappets are now rattling but more worrying when i try to start it in the morning it starts but dies, then when i try to restart it sounds like the starter isnt engaging.when it eventually does restart it sounds awfull until the car warms up and it drives normally. ive been told by a mate that it could be the cam sensor.if it is where can i buy 1 and how much will it be?? is it easy enough to change??

plz plz help i miss my fast baby

davie

[eh?]

hii need advice, i recently boiled my engine on my skyline r33 gts-t when the fan belt snapped. it cost me 2 grand to fix it,when i got it back 2 of my tappets are now rattling but more worrying when i try to start it in the morning it starts but dies, then when i try to restart it sounds like the starter isnt engaging.when it eventually does restart it sounds awfull until the car warms up and it drives normally. ive been told by a mate that it could be the cam sensor.if it is where can i buy 1 and how much will it be?? is it easy enough to change??

plz plz help i miss my fast baby

davie

Check the coolant temp sensor and make sure your ecu is getting the start signal.

[BigC_1988]

I swapped a rb25 in my R32 but the car won't start. The problem is NO SPARK. Can this also be caused by the crabk angle sensor?

[s13kidd]

ok so i just bought an 89 240 with a RB20 swap but it doesnt run. i do not have spark! i thought it might be the ignitor so i bought a used one and still nothing. all my coil packs are fine, cause ive tested them with specs from and r32 shop manual. i also ran a code test on my ecu and came back with 55 which is "all ok". my next guess if Cam Angle Sensor...

anyone got any advice?

[carcrzy920]

well i have had all those problems the last couple weeks and cant for the life of me figure out whats wrong with my rb20. except for today, i was checking every thing over trying to find out why it only runs on 2 cylinders (yea it runs on 2 haha). if i take out ALL my coil packs and spark plugs and turn the cas they all get spark and all my injectors click and spray fuel and i have no vac leaks. but when i get it started it sounds like a domestic. i can unplug every coil pack except for the 1st one and the 3rd one in the line and nothing changes. Then today i was messing with it and had it running for a min on its 2 cyl. and then i turned it off to reset my cas and crank. well when i was taking out the cas i droped it . well i brushed it off and put it in and wouldnt you know it i got fire on all six. i was sooo happy. turned it off because i set timing wrong and it was popin s*** but when i reinstalled it and turned it on its only a 2 cyl. sooo im guessing its that after i have replaced my ecu and ignitor and cleaned everything. so my main question is. do any cars crossreference that cas? a z32s looks like itll work but idk.

[l2u4k0assx]

so if you hear clicking when you turn the cam angle sensor that means its bad????

[l2u4k0assx]

hey so is there a certain way to put the cam angle sensor in / or will i have to retime my belt if you know please help if poissible

[Jetpower]

I totally agree with the symptoms. I just ordered a CAS for my RB25 S2 which was a ***** to find!! Apparently, late S2s used the NEO CAS. I have one being shipped from Australia as I type right now. When I heard that very loud backfire at 3 o'clock in the morning, I thought I was going to wake up the whole neighborhood.
Here is the issue with my CAS.

[d356bud]

When I first got my RB25 I didn't get a signal from the CAS and after troubleshooting it and trying a new sensor I realized one of the signal wires was some how grounded out in the harness.

[bmxarmy]

not to thread jack but since I am running megasquirt 2 I have a complete stock cas and power steering and ac setup if anyone needs. Glad I wont have these problems with the squirt setup! i like simple things.

[skyline084]

not to thread jack but since I am running megasquirt 2 I have a complete stock cas and power steering and ac setup if anyone needs. Glad I wont have these problems with the squirt setup! i like simple things.

you have cas for s1 rb25? If you do, where are you located and how much?

[skyline084]

and here's a question... I think my CAS is shot.
Wiring is all good, everything gets appropriate voltage.
I get fuel, pump primes, plugs are wet.
I don't get spark. Replaced igniter, all 6 coils going bad at once? don't think so.
I haven't manually turned the CAS to see if injectors click but will do tomorrow.
It has symptoms where it will all of a sudden drop in rpms, backfire and stall. Than usually not start again for a while.
I replaced Igniter chip and thought it solved the issue, started, idled fine. Even drove it. Now it won't start, but if it does it backfires, hesitates, and dies.
So my question is.. can the CAS go in and out of working like this?

[Darius]

I went to start my car today since I hadn't for a couple weeks and it would not fire. I hooked up the laptop to see what was happening and it is not getting an RPM signal from the CAS. I took the ground off the terminal, sanded all the terminal surfaces, reconnected, and it still did not send a signal. I think the CAS signal itself has appeared "noisy" and unstable at times, which might have been an indication that it was on its last leg. Can these be disassembled and rebuilt, or should I just order one from rawbrokerage.com?

[chad b.]

I just bought a brand new OEM CAS from Eric's Performance Parts. It was $375. I figured it would be a good investment over buying a 20 year old unit and having it fail. Here is a link to their ebay page. http://stores.ebay.com/Erics-Performance-Parts
They're also on facebook.

[chad b.]

Never mind. That sorry MF is advertising Mitsubishi CAS's but selling Hitachi units. That's what he sent me.

[Darius]

Is there a difference in the plug or anything? Or are they virtually identical units?

[xracerx972]

Rb25s came from the factory with different CAS. Some came with Mitsu(like mine) others came with Hitachi. This is normal.

[chad b.]

The plugs are the same and they work the same. The difference is the trigger disk cannot be changed in the Hitachi units. I found a couple Nissan dealerships out West that sell new oem CAS's for $275. After contacting Eric's Performamce, the refunded me $75 to make it right.