'89 CRX HF + D15Z1 troubleshooting... - Page 8 - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 02-19-2009, 10:21 PM   #71
Registered Member
 
imzjustplayin's Avatar
 
Join Date: Dec 2011
Posts: 720
Country: United States
Quote:
Originally Posted by bobski View Post
Chilton and Haynes write their own service manuals... Helm, Inc. reprints factory service manuals.

Who said anything about a roll cage?
Sorry that post was directed towards the OP, I just thought you were the OP and figured I'd throw that in as well. Yes when you said Helm, I was thinking of Haynes and the like.
__________________

imzjustplayin is offline   Reply With Quote
Old 08-10-2010, 06:38 PM   #72
Registered Member
 
Join Date: Aug 2010
Posts: 1
Country: United States
Re: '89 CRX HF + D15Z1 troubleshooting...

Hey buddy, did you ever end up resolving that bucking issue on your crx ? Im in Australia and I have the exact same problem ! Cant figure it out !!
__________________

hoplite22 is offline   Reply With Quote
Old 08-28-2010, 06:16 PM   #73
Registered Member
 
MakDiesel's Avatar
 
Join Date: May 2006
Posts: 200
Country: United States
Re: '89 CRX HF + D15Z1 troubleshooting...

Sadly, I never really figured out the cause. I continue to drive the car on weekends and for fun, maybe 4-5k miles a year and the buck issue comes and goes, right now it's in full force. Definitely irritating, but other priorities are taking up time. The Shift light still flickers before staying lit and the bucking seems to get worse after I've hammered her a little. Eh, I'm out of ideas but my guess is wiring or vacuum related. It's the only thing keeping this car from being 100% success tho. Mak

P.S. on the upside, MPG has been a consistent 55-60 this year!
__________________
'85 CRX Si Original EW3 @ 254k...suck it Detroit
'89 CRX HF-Z1 ~ When haste is needed
'97 Civic DX Hatch ~ Formerly 600hp, now 0hp, soon 115hp.

MakDiesel is offline   Reply With Quote
Old 05-02-2011, 09:28 PM   #74
Registered Member
 
MakDiesel's Avatar
 
Join Date: May 2006
Posts: 200
Country: United States
Re: '89 CRX HF + D15Z1 troubleshooting...

Overdue update time...

I had a spare minute today and decided to play around with this everlasting buck problem that has persisted so long. I warmed the car up and drove her back to back with the TPS hooked up like normal and then without (with CEL glaring) and it was like night and day! With the TPS hooked up she's a temperamental beast, lower idler, studders mid-shift, and bucks randomly in gear w/ no throttle input. W/o the TPS hooked up, she rides like a caddy, accelerates without fuss, and DOES NOT flinch when decelerating in gear! If it wasn't for the high idle (1.6k-ish) I would just leave her unhooked and say f-it. Anyone want to chime in on how I can make this problem go away (with no CEL & high idle)? Thanks, Mak

P.S. The ECU has been checked w/ a known good one, the TPS (with sensor) has been checked before, and the wiring reports correct respective voltages as reported literally years ago in this thread.
__________________
'85 CRX Si Original EW3 @ 254k...suck it Detroit
'89 CRX HF-Z1 ~ When haste is needed
'97 Civic DX Hatch ~ Formerly 600hp, now 0hp, soon 115hp.

MakDiesel is offline   Reply With Quote
Old 05-02-2011, 10:27 PM   #75
Registered Member
 
imzjustplayin's Avatar
 
Join Date: Dec 2011
Posts: 720
Country: United States
Re: '89 CRX HF + D15Z1 troubleshooting...

Quote:
Originally Posted by MakDiesel View Post
Overdue update time...

I had a spare minute today and decided to play around with this everlasting buck problem that has persisted so long. I warmed the car up and drove her back to back with the TPS hooked up like normal and then without (with CEL glaring) and it was like night and day! With the TPS hooked up she's a temperamental beast, lower idler, studders mid-shift, and bucks randomly in gear w/ no throttle input. W/o the TPS hooked up, she rides like a caddy, accelerates without fuss, and DOES NOT flinch when decelerating in gear! If it wasn't for the high idle (1.6k-ish) I would just leave her unhooked and say f-it. Anyone want to chime in on how I can make this problem go away (with no CEL & high idle)? Thanks, Mak

P.S. The ECU has been checked w/ a known good one, the TPS (with sensor) has been checked before, and the wiring reports correct respective voltages as reported literally years ago in this thread.
bad wiring bad/intermittent failure of TPS sensor?
imzjustplayin is offline   Reply With Quote
Old 05-03-2011, 09:24 AM   #76
Registered Member
 
Join Date: Nov 2007
Posts: 1,460
Country: United States
Location: north east PA
Re: '89 CRX HF + D15Z1 troubleshooting...

Perhaps in the wiring between the sensor and ECU.
trollbait is offline   Reply With Quote
Old 05-03-2011, 10:55 AM   #77
Registered Member
 
MakDiesel's Avatar
 
Join Date: May 2006
Posts: 200
Country: United States
Re: '89 CRX HF + D15Z1 troubleshooting...

I'm more than frustrated on this problem, as it has plagued me since day one of the successful swap. My next free day I'll rewire the sensor directly to the ECU pin-outs and then I should have my answer...or more difficult questions...hopefully it was a simple switch of the wires, a worn piece of wire grounding out, or possibly a Rywire fault on the conversion harness, altho that's remote.

Thanks, Mak
__________________
'85 CRX Si Original EW3 @ 254k...suck it Detroit
'89 CRX HF-Z1 ~ When haste is needed
'97 Civic DX Hatch ~ Formerly 600hp, now 0hp, soon 115hp.

MakDiesel is offline   Reply With Quote
Old 05-09-2011, 08:39 PM   #78
Registered Member
 
MakDiesel's Avatar
 
Join Date: May 2006
Posts: 200
Country: United States
Re: '89 CRX HF + D15Z1 troubleshooting...

Spent several hours Friday tracking wires and voltages, long story short the TPS cannot be my problem, nor can the MAP or conversion harness. Considering that when I disconnect the TPS, the ECU artificially raises the idle to compensate & all my problems miraculously disappear, I'm going to reset the idle according to HELMS and go after the IACV and that other manifold sensor (TW in the book IIRC). After that, it's on to the O2 sensor and I do not want that to be a costly lesson in bought-but-didn't-fix lesson. Mak
__________________
'85 CRX Si Original EW3 @ 254k...suck it Detroit
'89 CRX HF-Z1 ~ When haste is needed
'97 Civic DX Hatch ~ Formerly 600hp, now 0hp, soon 115hp.

MakDiesel is offline   Reply With Quote
Old 05-10-2011, 12:08 AM   #79
Registered Member
 
imzjustplayin's Avatar
 
Join Date: Dec 2011
Posts: 720
Country: United States
Re: '89 CRX HF + D15Z1 troubleshooting...

Quote:
Originally Posted by MakDiesel View Post
Spent several hours Friday tracking wires and voltages, long story short the TPS cannot be my problem, nor can the MAP or conversion harness. Considering that when I disconnect the TPS, the ECU artificially raises the idle to compensate & all my problems miraculously disappear, I'm going to reset the idle according to HELMS and go after the IACV and that other manifold sensor (TW in the book IIRC). After that, it's on to the O2 sensor and I do not want that to be a costly lesson in bought-but-didn't-fix lesson. Mak
if you do go ahead with cleaning the IACV, I suggest taking off the throttle body and giving it a thorough cleaning. I know on my throttle body there was a lot of gunk inside of the passages, especially in the passage for the the idle screw. Btw, have you replaced the PCV valve? Checked for vacuum leaks, etc?
imzjustplayin is offline   Reply With Quote
Old 05-10-2011, 05:32 PM   #80
Registered Member
 
MakDiesel's Avatar
 
Join Date: May 2006
Posts: 200
Country: United States
Re: '89 CRX HF + D15Z1 troubleshooting...

Quote:
Originally Posted by ************* View Post
if you do go ahead with cleaning the IACV, I suggest taking off the throttle body and giving it a thorough cleaning. I know on my throttle body there was a lot of gunk inside of the passages, especially in the passage for the the idle screw. Btw, have you replaced the PCV valve? Checked for vacuum leaks, etc?

When I swapped TB's I cleaned the newer one before installing, no change. I've cleaned the IACV recently, the mesh looked fine, now I'm leaning towards electrical issues with both sensors, something I haven't tested. The PCV valve is new, and with the straight-through VX design I don't see how it can fail, it's just a hollow elbow. I've sprayed at least a solid can of Carb Cleaner on every hose/intake manifold before trying to find vac leaks, but have never witnessed changes in idle. Has anyone ever deleted the IACV to get a more predictable idle, and erase common Honda surge issues or is this just more trouble than it's worth?

Mak
__________________

__________________
'85 CRX Si Original EW3 @ 254k...suck it Detroit
'89 CRX HF-Z1 ~ When haste is needed
'97 Civic DX Hatch ~ Formerly 600hp, now 0hp, soon 115hp.

MakDiesel is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Why not add location to fuel ups? T5i Fuelly Web Support and Community News 11 07-12-2014 11:55 PM
Filter by Imperial vs. U.S. Gallons? bvz2000 Fuelly Web Support and Community News 4 05-02-2013 08:33 PM
Using a multimeter as a cheapo scangauge? ZugyNA Hypermiling 2 07-30-2007 07:05 AM
XFi mirror caps? baddog671 General Fuel Topics 4 07-10-2007 03:51 PM
VX Head Question GasSavers_scostanz General Maintenance and Repair 8 02-17-2007 04:27 AM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 03:31 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.