Dipping Idle & Pickup Hesitation

Cutz · Post by **Cutz** » Thu Nov 14, 2013 5:55 am

Word up boys,

got a real nagging problem with my H22 as it's ruining the drivability of my freshly converted EJ-H22 civic.

Basically the 2 main issues are:

1. Idle dipping on deceleration to 600rpm, IACV can't catch revs in time...feels a little slow to react but can't be sure. i've got poly mounts so I feel this soooo much more!
2. Minor hesitation as revs initially blipped, generally have to blip throttle everytime i pull off regardless.

I'm pretty sure both these issues are connected, I do get a little bit of an idle hunt but nothing major.

I've checked for the most common things (vacuum leak & coolant air pocket) and I'm 99% sure this isn't the case.
dizzy, plugs, arm, coil are all new
timing is spot on
idle has been increased slightly due to TSB regarding oil pressure @ low rpm's

going to do some more checks today but has anyone got any quick ideas??

Post by **ADS1** » Thu Nov 14, 2013 9:12 am

A leak in the mani or downpipe could cause this, especially if near o2 sensor(I had this).

Post by **Merlin** » Thu Nov 14, 2013 9:18 am

is it just a standard prelude H22? No ATR intake manifold or anything? Do this happen while cold or hot or both?

ADS1 wrote:A leak in the mani or downpipe could cause this, especially if near o2 sensor(I had this).

I had this too on a previous Lude. My flexi pipe had a hole in it.

Cutz · Post by **Cutz** » Thu Nov 14, 2013 2:12 pm

Merlin its a standard h22a jdm at the mo,
Downpipe back solid fabrications 2.5" system
Ps delete
Light flywheel &:pulleys
Hondata intake gasket
Induction kit
Spoon chip & p13

Gonna borrow bucks420's hondata s300, hopefully ill be able to spot something in the graphs hmmm
Cutz

Bri · Post by **Bri** » Thu Nov 14, 2013 9:28 pm

CUTZ how the drokk are ya? I Have same thing but it is slight. it could be either IACV or the one that drokked my head for months which was ignitor coil in the dizzy, do a dizzy swap and if it goes then you know. Make sure you got a strobe honkey.

mercutio · Post by **mercutio** » Thu Nov 14, 2013 9:38 pm

cutz welcome back you still got that 4g bonnet

Cutz · Post by **Cutz** » Thu Nov 14, 2013 10:26 pm

the bonnets gone mercutio...it hung around for ages and we resprayed and fitted it to a mates 4g,

he scrapped the car but i did manage to grab the carbon vents before it got destoryed though

still sitting in my garage...

dizzy's been sorted bri, new cap, rotor arm, leads, coil, timings perfect, no vacuum leaks, fitv works fine it;s bloody gay

i've replaced EVERYTHING in this build...i really need to do a build thread but i just cant be arsed!

mercutio · Post by **mercutio** » Thu Nov 14, 2013 10:34 pm

oh you selling the vents then

Cutz · Post by **Cutz** » Thu Nov 14, 2013 10:49 pm

mercutio wrote:oh you selling the vents then

perhaps....

Bri · Post by **Bri** » Sun Nov 17, 2013 7:08 pm

change the dizzy itself, honestly, I went through everything, even to the fuel pump. It took me months of searching and swearing and head scratching.