Breaking Down Issue

[adrnln]

Hi all

Down at a private pratice day, my RB20det Ceffy started to break down from 4k rpm right through the rev range I have changed over AFM and ignitor pack with no change. It will free rev most of the time but under load will break down in and out.

What else could it be??

Cheers Billy.

[Nic_A31]

My 20E was doing this and I narrowed it down to CAS.

Guy in the thread the other day had same problem and was CAS as well.

July - the "everyone replace their Crank/Cam Angle Sensor" month ??

[toffy]

or coil packs / spark plugs

Edited July 19, 2010 by toffy

[Dorigecko]

check plugs and packs first, they're the most likely culprit. but if not, you can probably put your money on the crank angle sensor.

[V28VX37]

+1 for checking your CAS. See my earlier thread here.

[S1LV3RTRACKS]

+2 for checking your plugs/packs and CAS. Had a similar issue with my R33 which was fixed by swapping the CAS.

[Dorigecko]

Oh snap I even have an aftermarket part number for you.

Check it before you buy it, but here's an ACA Electrics number:

2CS403N. Suits RB30e's but reckons it may suit all RB up to R34 RB26.

[Nic_A31]

Arent the sensors different between E and DE ?

[Nic_A31]

Actually now that I think about it....the amount if disasembling the distributor I had to do .... they could be the same.

I know that RB20E is different to 30E.....hmmm might go check sensor on my DET loom, see if it fits the E.

[adrnln]

From memory thier are two types of plugs square and round is this just the difference in age of engine??

[Nic_A31]

I got an R33 RB20E dizzy today, it has a ROUND plug but same bolt in formation as RB30E (which is square plug, same as RB20E plug, but different bolt in pattern and slightly larger)

i'd assume plug type differs with age of engine

RB30E and RB20E (A31) are both late 80s....early 90 the Cefiro shifted to the same loom as R32/33, with round plugs in various places (ignitor loom, AFM, etc).

Early model = square plug, late model = round sloppy 'ole ??

[Conrad 2NR]

I think mine is doing the same :S

So far I'm leaning towards the CAS on my RB25. From 4500 up on a dyno sheet it can be seen where the graph drops off from 145 hp and tries to climb again only to reach a max of 145 @ the rev limit.

[adrnln]

Got another CAS but with round plug will cut and resolder new plug on and see how we go.

[adrnln]

Replace CAS and she runs fine now I only need to get her warmed up at the track and see if can perform.

Cheers everyone.