Fordmods Logo

89 ke laser miss 

 

Page 1 of 1 [ 7 posts ] 

 
 Post subject: 89 ke laser miss
Posted: Sun Apr 27, 2008 7:19 pm 
Getting Side Ways
Offline
User avatar

Age: 39

Posts: 2282

Joined: 14th Jan 2005

Gallery: 8 images

Ride: ED Fairmont Ghia & EF XR8

Location: Melbourne
VIC, Australia

hi, i have this 89 ke laser auto with a 1.6ltr carby motor. bought the car with a seized motor. i pulled the old one out and replaced it with a 2nd motor from a wrecker which had supposedly done 150,000klms.

now it has an inconsistent misfire which is driving me nuts as i can't work out what the problem is. so far i have:

- changed plugs am using gen. ford plugs (ive done this twice as the first set fouled right up like you wouldn't believe)
- replaced air and fuel filter

- gave it an oil and filter change but used 10w-30 oil as i had a few litres in the garage


i have checked the ignition lead resistance here are the results:

no1 - 3.54
no2 - 3.22
no3 - 2.83
no4 - 2.09
coil lead - 1.55

all of the above were measured with a multimeter set too 20k resistance

i have cleaned up the contacts on both the dizzy cap and rotor button

it idles fine when cold but when it warms up it develops a miss its not even a consistent one at the its very erratic.

ive set timing to 2deg BTDC as per the sticker under the bonnet

now would the 10w-30 oil be slipping past the rings and into the combustion chamber causing the motor to miss

are my ign leads rooted

perhaps the mixtures are right out of whack


any help with this is greatly apprciated and sorry for the long post.

cheers in advance

 

_________________

Image

Top
 Profile  
 
 
Posted: Sun Apr 27, 2008 7:50 pm 
Getting Side Ways
Offline

Age: 72

Posts: 2542

Joined: 18th Mar 2006

Ride: EF-XR8chaser

Location: wollongong
NSW, Australia

compression test it

 

_________________

R.I.P HANS HARTMAN

Top
 Profile  
 
 
Posted: Mon Apr 28, 2008 8:33 pm 
Getting Side Ways
Offline

Posts: 6449

Joined: 11th Nov 2004

idle circut in the carby is blocked.

if it's fine when the choke is one but carries on when the choke is open it's the only thing it can be.

run it and have a look down the carby if it's drawing feul from the booster discharge, you have to much idle opening, because you are trying to compensate for having no idle circut. you may also hear a crackling noise from the carby

main metering mixures will be fine, unless feul jets or air bleeds are partly blocked.

also set the timing at 6-8degress.
Top
 Profile  
 
 
Posted: Wed May 07, 2008 1:06 am 
Getting Side Ways
Offline
User avatar

Age: 39

Posts: 2282

Joined: 14th Jan 2005

Gallery: 8 images

Ride: ED Fairmont Ghia & EF XR8

Location: Melbourne
VIC, Australia

whoops

 

_________________

Image

Top
 Profile  
 
 
Posted: Thu May 08, 2008 3:56 pm 
Parts Gopher
Offline

Age: 35

Posts: 55

Joined: 16th Apr 2008

Ride: 4Runner

Location: Padbury/Armadale
WA, Australia

I'd try having a look at your leads in the dark. If you see blue flashing lights along the leads or sparks jumping to the body...she's stuffed.

 

_________________

Toyota 4Runner Spirit V6
-The True Aussie Spirit (except bundy)

Top
 Profile  
 
 
Posted: Thu May 08, 2008 5:51 pm 
Moderator
Offline

Posts: 14489

Joined: 7th Nov 2004

Ride: AU XR8

Location: a shit suburb in sydney
NSW, Australia

is the plug fouling up with oil or fuel??
if its fuel i would just change the leads.
Top
 Profile  
 
 
Posted: Thu May 08, 2008 10:28 pm 
Getting Side Ways
Offline

Posts: 6449

Joined: 11th Nov 2004

it take a few thousand Ks to oil foul a plug.

so they would be fuel fouled. but i'd leave the leads alone and work out why the choke is staying on.
Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 1  [ 7 posts ] 

Who is online

Users browsing this forum: No registered users and 0 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Fri Mar 29, 2024 8:58 am All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names