Login
▼
Register
Home
Help
Advertise
Login
Register
VWDiesel Blog
Facebook Group
VWD on Twitter
VWDiesel.net The IDI, TDI, and mTDI source.
»
Engine Specific Info and Questions
»
IDI Engine
(Moderators:
malone
,
burn_your_money
,
Vincent Waldon
,
theman53
) »
Rough idle in the morning (when cold).... What could it be??
« previous
next »
Print
Pages: [
1
]
Author
Topic: Rough idle in the morning (when cold).... What could it be?? (Read 4579 times)
October 18, 2004, 11:36:59 am
ThumperTheRabbit
Newbie
Offline
5
Rough idle in the morning (when cold).... What could it be??
«
on:
October 18, 2004, 11:36:59 am »
My little rabbit has been great so far. It has 133k miles on it and gets 47 mpg when I cruise at 60mph... My only worries are these: When I start the car in the morning, it idles really rough and smokes a combination of whitish blue smoke... If I rev it up the smoke goes away but you can hear the engine "missing"... After the engine is warm, it idles like a dream... Smooth and almost no smoke (blue or otherwise). However it does spit out a nice cloud of Black smoke (fuel) when you "jab" the accelerator on the highway
:D... I use that to remove tailgaters
:D...
So would anyone have any suggestions on what this could be?? I changed the fuel filter already and that didn't help... I was thinking possibly injectors, but I don't know what the life is on the average 1.6l NA injectors... If anyone has any inputs I would greatly appreciate it!!
This is my second rabbit. My first one I got when I was 17 and ended up replacing the headgasket myself... However, something happened (didn't get the right headgasket??) and the car would never start again
... I am glad that I found a group of people that know these engines. I hope to learn lots!!!
Educate me!!!!
:D
Logged
1981 VW Rabbit L Diesel
-- 133k miles... 47mpg
Reply #1
October 18, 2004, 07:30:53 pm
okumaguru
User+
Offline
33
Rough idle in the morning (when cold).... What could it be??
«
Reply #1 on:
October 18, 2004, 07:30:53 pm »
Sounds like you are describing my Rabbit also. I didn't notice it when the weather was warm but now that it's getting cooler, I've been noticeing the exact smae thing.
Could it be common with the diesels?
Thanks
Tim
Logged
Reply #2
October 19, 2004, 11:25:14 am
DieselsRcool
Junior
Offline
152
Rough idle in the morning (when cold).... What could it be??
«
Reply #2 on:
October 19, 2004, 11:25:14 am »
It's that time of year again when the bad glow plugs become obvious. Pull your injectors and look down the holes while the glow plugs are on. Chances are you'll find one bad one.
Logged
Reply #3
October 19, 2004, 01:11:36 pm
BlackTieTD
Veteran
Offline
1512
Rough idle in the morning (when cold).... What could it be??
«
Reply #3 on:
October 19, 2004, 01:11:36 pm »
i second... check glow plugs. have fun!
Logged
Reply #4
October 21, 2004, 01:06:58 am
gldgti
Veteran
Offline
488
Rough idle in the morning (when cold).... What could it be??
«
Reply #4 on:
October 21, 2004, 01:06:58 am »
also, timing might be a bit retarded. infact, advanced timing helps prevent this happening even if your timing is normal. you'll notice if, once its started, you push in the cold start valve, it will 'miss' more often.
Logged
'77 Golf LS 4 door twincharger project
'91 Golf Cabrio 1.9TD
'94 Golf TD - AAZ, 2.5" Mandrel DP and exhaust, Merc T3 1.6TD boost pin, FMIC, Koni suspension, VR6 Brakes, VR6 Seats, VR6 sway-bars - sadly missed
'07 SKODA Octavia 1.9 TDI PD - Remapped ECU
Reply #5
October 21, 2004, 05:17:00 am
okumaguru
User+
Offline
33
Rough idle in the morning (when cold).... What could it be??
«
Reply #5 on:
October 21, 2004, 05:17:00 am »
Which way is advancing the timing? Moving the pump towards the block or towards the radiator?
Tim
Logged
Reply #6
October 21, 2004, 08:30:13 am
DieselsRcool
Junior
Offline
152
Rough idle in the morning (when cold).... What could it be??
«
Reply #6 on:
October 21, 2004, 08:30:13 am »
Move the top of the pump back toward the engine to adv the timing.
Logged
Reply #7
October 22, 2004, 11:45:32 am
Dr. Diesel
Authorized Vendor
Veteran
Offline
1341
Rough idle in the morning (when cold).... What could it be??
«
Reply #7 on:
October 22, 2004, 11:45:32 am »
if you decide to pull the injectors, don't forget to install new heat shields (correctly!!) as they're one-shot deals, and very cheap from the dealer.
Alternately, if you have an appropriate ammeter, you could meter the current being drawn. I believe it's 8 amps per plug. So, if it's drawing only 24, you know you've got one burnt out. Also, you could remove the power bus from the glowplugs and meter each plug individually with an ammeter or and ohmmeter to ground.
Logged
I repair, maintain and modify VW's and BMW's.
Good work done at affordable rates. Welding and fabricating, too.
Performance Diesel Injection's Super Pump: gotta have one!
Reply #8
October 23, 2004, 12:05:06 pm
dieselpower
Junior
Offline
177
Rough idle in the morning (when cold).... What could it be??
«
Reply #8 on:
October 23, 2004, 12:05:06 pm »
this is what i do to check the engine.
i start it when it's cold, then if one cyliner is missing i start crackin the injection lines one at a time. and when you crack one and the engine's idle stays the same, thats the cylinder thats giving you problems. then you can check that glowplug, compression, or injector to find the problem of why it dos that when its cold. it's most likely the glow plug and i find that if i overtighten them it makes them burn out faster.
hope this helps
Mark
Logged
84 rabbit 1.6TD
because real cars don't have sparkplugs
Print
Pages: [
1
]
« previous
next »
VWDiesel.net The IDI, TDI, and mTDI source.
»
Engine Specific Info and Questions
»
IDI Engine
(Moderators:
malone
,
burn_your_money
,
Vincent Waldon
,
theman53
) »
Rough idle in the morning (when cold).... What could it be??