mraudio13

Ok here is what i have, 2001 integra t3 turbo, sfp mani and downpipe, hks standard wastegate, hks SS bov, Hondata tuned at 10lbs, Skunk2 intake manifold, hondata gasket, my numbers are 240hp 190tq. Here is my problem. when driving the car between 3500 and 4500 rpm's, if I hold the car at a constant speed lets say 70mph. back off the throttle a little then push it a little the car misses. Sort of like a hiccup. I took it back to my tuner and we could get it to do the same thing on the dyno, but he can't figure out why it is doing it. He played with it for 2 hours on the dyno with no luck. The car didn't do this before I put hondata in it? I just thought i would get some ideas from the experts here on honda-tech to try and trouble shoot this problem, Thanks in advanced.

Matt Rodgers

Adi Radoncic

Does it happen in every gear or load level??

Maybe this is your problem..

http://www.hondata.com/techhes.html

ATS*Mark

sounds like a typical part throttle vacuum bug....my car has it too.

mraudio13

part throttle vacuum bug? Does this mean i have a leak? I purchased a eagle vacuum block just haven't installed it yet. I read the hondata page and it seems like i have a lot of things to check. Any other ideas or elaborations?

mraudio13

yes it does it in every gear, and only whrn there is a load.

ATS*Mark

no but if you look at your hondata map , you have tables , some are in vacuum(before boost) and the rest are in boost . you need to look at your boost guage and see if you can tell when you get the hickup , at what vacuum you get the hickup and what rpm....and adjust your map accordingly.

mraudio13

it is at 10 inches of vacuum and between 3500 - 4500 rpm's

mraudio13

has anybody tried the recomended stuf on hondata's website, have they fixed anyone's problem??

Check all sensor readings for abnormal values.
Disconnect the ALTC wire if the battery voltage drops below 13V
Make sure the part throttle operation of the vehicle is well tuned. The short term adjustment should be from -10% to +10%. -5% to +5% is ideal.
If you're not concerned about emissions, add a lot of timing at part throttle.
Try changing the 'maximum closed loop load' higher if you get hesitation upon throttle tip in. If this helps then the real issue is the part throttle fuel maps.
Pull apart the engine bay wiring connectors and clean the contacts. If they are corroded then file them clean as well.
Check that the main ground to the thermostat housing is good, and there is no voltage difference between the negative terminal of the battery and the ground point.
Disconnect anything tapping into the o2 sensor wire, including any autometer type lambda displays.
Check that the shields on the wiring harness are not grounded at both ends. (The distributor wires and o2 sensors are shielded).
If there are any devices tapped into the ECU wiring loom, consider disconnecting them and returning the wiring harness to stock.
Check that the fuel pressure regulator has sufficient adjustment left to regulate fuel pressure at high vacuum.