If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Flat spot with d15b7 EG civic
Hi,
My 1995 EG d15b7 Honda civic (not modified in any way) has a flat spot between 2000rpm and 4000rpm. I have tried new plugs, new fuel and air filters, checked timing, new plugs, different plug gap, fuel cleaners and better petrol, checked resistance on leads and cleaned the distributor cap and button but the problem does not go away. Does anyone have any ideas on what it might be or how to diagnose it. Regards, Mike |
Ads |
#2
|
|||
|
|||
Flat spot with d15b7 EG civic
On 10/15/2010 07:11 AM, MikeLikes wrote:
> Hi, > My 1995 EG d15b7 Honda civic (not modified in any way) has a flat spot > between 2000rpm and 4000rpm. I have tried new plugs, new fuel and air > filters, checked timing, new plugs, different plug gap, fuel cleaners > and better petrol, checked resistance on leads and cleaned the > distributor cap and button but the problem does not go away. Does > anyone have any ideas on what it might be or how to diagnose it. > > Regards, > Mike automatic? [don't presume that "d15b7 tells us enough.] if so, it's the egr valve and passages clogged. also check the transmission fluid is not over-full and that the kick-down cable is adjusted properly. as a separate issue, do not "clean" the distributor cap and button: 1. unless you've taken the essential precaution of wearing gloves, sweaty fingers can leave salty residues on them which attracts moisture and causes spark leakage. same applies to plugs and leads. 2. if the cap is aftermarket and has brass contacts, oxide product can be conductive and you're simply smearing it around. replace with oem honda cap with all aluminum contacts which doesn't have this problem. -- nomina rutrum rutrum |
#3
|
|||
|
|||
Flat spot with d15b7 EG civic
It's a 5 speed manual not an auto and the cap is oem.
|
#4
|
|||
|
|||
Flat spot with d15b7 EG civic
On 10/15/2010 02:09 PM, MikeLikes wrote:
> It's a 5 speed manual not an auto and the cap is oem. was the timing belt changed recently? belt may be off a tooth. if the distributor is not centered to get it timed, that's the tell-tale. -- nomina rutrum rutrum |
#5
|
|||
|
|||
Flat spot with d15b7 EG civic
Yes the timing belt was changed recently but the problem was there
before the change. I am pretty sure that the crank and the cam were lined up at TDC as I dis the timing belt change. |
#6
|
|||
|
|||
Flat spot with d15b7 EG civic
On 10/18/2010 12:24 AM, MikeLikes wrote:
> Yes the timing belt was changed recently but the problem was there > before the change. I am pretty sure that the crank and the cam were > lined up at TDC as I dis the timing belt change. pedantically speaking, the important thing is that they're lined up /after/. did you follow the checking procedure outlined in the factory honda manual? haynes manuals are notoriously awful. loose belts jump teeth too, so even if timed before, they can be out later. again, check the ignition timing and confirm that the distributor is close to center. beyond that, you'll need to be more specific with diagnosis rather than this "hopefully lucky" guesswork stuff. a compression test might be in order for instance. -- nomina rutrum rutrum |
#7
|
|||
|
|||
Flat spot with d15b7 EG civic
Thus spake jim beam > :
>On 10/18/2010 12:24 AM, MikeLikes wrote: >> Yes the timing belt was changed recently but the problem was there >> before the change. I am pretty sure that the crank and the cam were >> lined up at TDC as I dis the timing belt change. > >pedantically speaking, the important thing is that they're lined up >/after/. did you follow the checking procedure outlined in the factory >honda manual? haynes manuals are notoriously awful. loose belts jump >teeth too, so even if timed before, they can be out later. again, check >the ignition timing and confirm that the distributor is close to center. > >beyond that, you'll need to be more specific with diagnosis rather than >this "hopefully lucky" guesswork stuff. a compression test might be in >order for instance. My 96 EX 5 speed had a similar sort of flat spot, even before the belt was changed. Which made it kind of a PITA when I was Auto-Xing. I don't know if it was specifically that, but after the O2 sensor was changed (via a CARB ordered recall) it "went away". Problem is, there were several other changes at the same time. -- - dillon I am not invalid Toby (Tri-Umph That's the Sweet Truth) March 1998 - June 2010 What a dog. What a dog! |
#8
|
|||
|
|||
Flat spot with d15b7 EG civic
On Oct 15, 10:11*am, MikeLikes > wrote:
> Hi, > My 1995 EG d15b7 Honda civic (not modified in any way) has a flat spot > between 2000rpm and 4000rpm. I have tried new plugs, new fuel and air > filters, checked timing, new plugs, different plug gap, fuel cleaners > and better petrol, checked resistance on leads and cleaned the > distributor cap and button but the problem does not go away. Does > anyone have any ideas on what it might be or how to diagnose it. > > Regards, > Mike Hi Mike Sounds like a "Vacumm" issue. Check for any leaks. |
#9
|
|||
|
|||
Flat spot with d15b7 EG civic
Hi guys,
Thanks for the tips. This now give me a starting point at what to look at. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
flat spot on tire | Raymond Cruz | Technology | 12 | February 13th 06 03:02 PM |
Idle speed dips after letting off gas - 92 civic d15b7 | Bob Radley (nazarl at idirect dot com) | Honda | 3 | June 24th 05 06:05 AM |
Idle speed dips after letting off gas - 92 civic d15b7 | Bob Radley (nazarl at idirect dot com) | Honda | 1 | June 23rd 05 09:40 PM |
Flat Spot | joe | BMW | 3 | March 7th 05 01:58 PM |
83 prelude flat spot | JZ | Honda | 1 | November 12th 04 02:31 PM |