Hesitation

nikp · May 22, 2009, 04:51:40 PM

I concur about the plugs - they look fine.

Bobbit · May 22, 2009, 07:56:00 PM

Right so started taking the manifold off tonight, spotted a pipe that had popped off the very front single solenoid so that may have been the cause, planning on still taking the manifold off tomorrow to ensure everything is as it should be.

neil_jdmr · May 22, 2009, 09:18:02 PM

Sound\'s like a good time to get all your goodies bolted up and mapped matey, Enjoy it for the summer :-)

Bobbit · May 26, 2009, 09:12:44 PM

ok so over the bank holiday weekend I checked out the rats nest and all is connected, no splits or cracks, everything is connected to the right part AFAIK. I\'ve changed all the pipes to the crv so i know there are no splits there either. Could it be my boost sensor is faulty and that is causing my problems?
I can hear boost leaking from the crv between 3500-4500 rpm but then I can hear the boost leak stopping and starting about 4-5 times in very quick sucession, like a woosh, woosh, woosh, woosh, woosh. Lasts about 2-3 seconds but then I get about 7-9psi of boost. Then if i try again i get what seems to be fuel cut with the car hesitating and the exhaust popping etc.
My probs started with these leak but I thought it was a solenoids, after taking the UIM off and replacing it i now get the hesitation/fuel cut. So could the boost sensor be faulty or could it be something i\'ve not thought of?
Thanks

leon · May 26, 2009, 10:52:04 PM

Have you tried doing the pin/led test to see if your ecu is complaining of any sensors out of range/shorted? I also seem to remember reading that one of those vac nipples at the read of the upper manifold vents to atmosphere. Never did check it though! (Saw it on Rx7club)

Bobbit · May 27, 2009, 03:09:35 PM

the what test?
Dont think any of the nipples should just vent as you\'ll just be loosing prreesue in the UIM, i was just wondering it the one way valves needed connecting to a specific nipple of if any would do.

Would a knackered fuse cause these probs?

Also as i\'ve got a new denso fuel pump from a supra will it be safe to drop that in or will that likely make things worse?

neil_jdmr · May 27, 2009, 09:36:48 PM

The l.e.d. test mate, it involves using a paperclip to short out two connection in your diagnostic port and then using an led to count the number of flashes which equates to an error code.

Bobbit · May 28, 2009, 10:35:49 AM

Ok, thanks Neil. I\'d have a look to see if I can find a how to.

nikp · May 28, 2009, 11:45:54 AM

If it is your map sensor that is at fault, i have my old one hanging around.

Bobbit · May 28, 2009, 11:53:33 AM

TBH bud i havent a clue what the fault is but if i can rule things out then it leaves me less to check. How much do you want for it?

MaLicE · June 27, 2009, 02:09:13 PM

did you ever sort this out? i have exactly the same issue! i just removed and replaced my uim im thinking i have some sort of boost leak will drive fine, idles a bit low and rough rev it and you can see black smoke (fuel) coming out the exhaust freely... drive it and you get to 5-6k and it seems to hesitate and hold back like i would expect a fuel cut, out of gear it will rev to redline easy....

Hesitation

MaLicE