Civic-EG.com Forum 3.3.1

- Sun Oct 19, 2008 9:39 pm #75080 Hi guys I've just done a b18c transplant in to my eg and its running yet the idle fluctuates between 1250 to 2000 rpm. I have done a search here and googled for people with similar problems and have checked the following.

IACV is clean
TPS sensor is working
coolant system as no air in it.
also checked for vacuum leaks by spraying some engine degreaser around the gaskets on the inlet manifold.

The ECU is only throwing one code CEL 20 (ELD) which I have not got to the bottom of either could this have an effect on the idle causing this sort of issue?

Also my ECU is p73 for an ITR but as I have just found out that my b18c is not out an ITR its either a GSR or SiR-G which I believe run on a p72 ECU. I realise this ECU will probably make my engine run crap but would this also cause this sort of idling issue?

Is there anything else i should check?

Cheers for the help in advance,

Dave

- Mon Oct 20, 2008 10:04 am #75169

Hi guys I've just done a b18c transplant in to my eg and its running yet the idle fluctuates between 1250 to 2000 rpm. I have done a search here and googled for people with similar problems and have checked the following.

IACV is clean
TPS sensor is working
coolant system as no air in it.
also checked for vacuum leaks by spraying some engine degreaser around the gaskets on the inlet manifold.

The ECU is only throwing one code CEL 20 (ELD) which I have not got to the bottom of either could this have an effect on the idle causing this sort of issue?

Also my ECU is p73 for an ITR but as I have just found out that my b18c is not out an ITR its either a GSR or SiR-G which I believe run on a p72 ECU. I realise this ECU will probably make my engine run crap but would this also cause this sort of idling issue?

Is there anything else i should check?

Cheers for the help in advance,

Dave

ELD in most cases is an issue with grounding.
HOWEVER the ECU you have may be running the wrong map, so have it socketed for Crome and have the right map burnt on it. I had the same issue with my P30, but soon as the remap was done everything was fine.
High idle, make sure you haven't got the MAP and TPS sensor connectors cross connected, they look exactly the same and is a common oversight

- Mon Oct 20, 2008 10:10 am #75170 Also just to clarify, have you had a multimeter on the TPS sensor to check that readings fluctuate correctly and the sensor is seated correctly in the position it should be. The multimeter should give you a reading of 0.45V at idle and fluctuations between reading should be gradual, they shouldn't jump

- Mon Oct 20, 2008 3:40 pm #75208 I have the same problem with my stock engine. As soon as I get my check, hopefully today, I'm taking it to get it fixed. The guy said it'll be around $50. If it's fixed, he's not getting the money if it's not haha, then I'll ask him what it is and let you know so maybe it will be to some help to you.

- Mon Oct 20, 2008 7:57 pm #75252

ELD in most cases is an issue with grounding.

Yeh one of my grounds was a little dodgy so I replaced that but it didn't help.

HOWEVER the ECU you have may be running the wrong map, so have it socketed for Crome and have the right map burnt on it. I had the same issue with my P30, but soon as the remap was done everything was fine.

I wish I could but the ECU is OBD2, and I've been struggling to find an OBD2 p72 so was thinking about just getting a conversion harness and an OBD1 p72. Do you know if there is any difference between the maps for a USDM p72 out a GSR to the JDM p72 or is it just the JDM will be capped and have no immobiliser.

High idle, make sure you haven't got the MAP and TPS sensor connectors cross connected, they look exactly the same and is a common oversight

Yeh pretty dam sure they are correct.

Also just to clarify, have you had a multimeter on the TPS sensor to check that readings fluctuate correctly and the sensor is seated correctly in the position it should be. The multimeter should give you a reading of 0.45V at idle and fluctuations between reading should be gradual, they shouldn't jump

I put a multimeter on it to check if it was fluctuating, but I didn't know what voltage it should be at for idling so I'll check that next time I get a chance to get home to see if its 0.45V as I can't remember what it was.

Cheers very much for the help, its really appreciated.

I have the same problem with my stock engine. As soon as I get my check, hopefully today, I'm taking it to get it fixed. The guy said it'll be around $50. If it's fixed, he's not getting the money if it's not haha, then I'll ask him what it is and let you know so maybe it will be to some help to you.

That would be great cheer very much.

- Wed Oct 22, 2008 5:28 am #75481 hey if im runnning a b16a wich was a japanese only motor if im correct will a usdm p30 run it correctly cause as of right now it runs like shit and idles sucks, i cleaned iavc and checked tps/map sensors, and looked for vaccume leaks.

- Sun Nov 02, 2008 11:41 pm #76968 Hey Matt did you ever find out what was causing your problem? as I am still at a total loss.
I got a new ECU wasn't expecting it to sort it but as I needed one anyway, I've got a feeling its a vacuum leak that I've not been able to find, but to say the least its starting to get a bit annoying.

Dave

- Fri Nov 14, 2008 9:13 pm #78666 I finally got to the bottom of this tonight , seems it was the FITV, the white plunger bit was a bit lose but more importantly one of the coolant pipes going into it was clogged up so got it all clean out reset the ECU and now it seems to sit a about 1050rpm on warm idle which still seems a little high but a lot better. Will probably get my mates tacho off him though to get a more accurate reading of what it is doing.

Cheers again for the help it was really appreciated.

Dave