| Author | Topic |
|---|
Location:
Brisbane
Registered:
January 2004
|
 Problem with my 4A-C .. any ideas?
|
Sun, 07 August 2005 00:12
|
 |
guys last weekend I was driving along and my car spluttered a few times and started to loose power then just died, I rolled off the side of the road and all I could smell was fuel. Took the air filter off and had a look down the carby, it was almost full to the top with fuel. The car was winding over like it had no compression at all so I just got it towed home till I had more time to look at it.
Yesterday I've finally got around to taking a look. First thing I checked was timing belt which is fine. Did a compression test and it came up zero on all 4 cylinders, needle didnt even move. Tested the guage on another car to make sure it was working correctly and then tried again. Again a big zero on the first three and this time about 5psi on number 4. Have taken the rocker cover off to check valve operation which seems to be fine, gave the top of each valve/spring a small tap to make sure they were seating. Then squirted a bit of oil into each cylinder and did a wet test....still zero compression accross the board
I'm pretty sure the fuel problem was just a stuck needle and seat, I've got a spare carby here I'll just throw on anyway cause I've never been able to get this carby to run right. But the compression problem has me confused. My boss was of the opinion all the fuel has washed the bores, and that if I just put oil down the spark plug holes and wind it over by hand for a while it should regain compression, but have wound it over by hand for about 15 minutes with oil in the cylinder then tried another compression test and it still came up zero.
Any suggestions would be greatly appreciated
thanks
Dave 
|
|
|
Location:
NSW Engadine
Registered:
June 2003
|
|
Re: Problem with my 4A-C .. any ideas?
|
Sun, 07 August 2005 00:26
|
|
The only plausable explanation is that your cam timing it out something severe... like 180 degrees, but I'd be fucked as to know how that could happen while driving or over night...
Unless someone secretly bored out your cylinders while you were sleeping and didn't get time to fit the bigger pistons...
|
|
|
Location:
Brisbane
Registered:
January 2004
|
|
Re: Problem with my 4A-C .. any ideas?
|
Sun, 07 August 2005 06:06
|
|
|
I currently live on a fairly busy street and it is sometimes hard to listen for small noises when it's busy. Today I had a bit more of a play and I've found why it has no compression, it's all coming straight back out the carby. Turning it over with the spark plugs is you can hear the air puffing out like when you have no plugs in, I've now realised you can hear it coming back out through the carby. Put your hand over the carby and you can clearly feel it.....anyone got any thoughts? I dont see how it could have taken the tops off all 4 inlet valves at the same time. Also I've put a magnet down the spark plug holes and there's nothing sitting on top of the pistons
|
|
|
Location:
Sunshine Coast
Registered:
July 2004
|
|
Re: Problem with my 4A-C .. any ideas?
|
Sun, 14 August 2005 07:32
|
|
Dont take it to heart, but i think a decent amount of your problem is that the 4ac is still in there! have you looked around the motor in general for fluids or stains ? eg. head gasket gone.. if worst comes to worst, i have a 4ac sittin at a mates place..
wes
|
|
|
Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
|
|
Re: Problem with my 4A-C .. any ideas?
|
Sun, 14 August 2005 07:47
|
|
|
dumb question.. are you doing compression test at WOT?
|
|
|
Location:
Brisbane
Registered:
January 2004
|
|
Re: Problem with my 4A-C .. any ideas?
|
Mon, 15 August 2005 23:13
|
|
| Wezelton wrote on Sun, 14 August 2005 17:32 |
Dont take it to heart, but i think a decent amount of your problem is that the 4ac is still in there! have you looked around the motor in general for fluids or stains ? eg. head gasket gone.. if worst comes to worst, i have a 4ac sittin at a mates place..
wes
|
a blown headgasket would still have some compression
|
|
|
Location:
Brisbane
Registered:
January 2004
|
|
Re: Problem with my 4A-C .. any ideas?
|
Mon, 15 August 2005 23:13
|
|
| oldcorollas wrote on Sun, 14 August 2005 17:47 |
dumb question.. are you doing compression test at WOT?
|
nope
|
|
|
Location:
Brisbane
Registered:
January 2004
|
|
Re: Problem with my 4A-C .. any ideas?
|
Mon, 15 August 2005 23:15
|
|
If anyone wants an AE71 wagon I really need this gone
$250 firm
I'll even throw in a spare 4A-CE motor
don't want to seperate anything as I really need this gone quickly
|
|
|
I supported Toymods
Location:
Perth.
Registered:
April 2005
|
|
Re: Problem with my 4A-C .. any ideas?
|
Mon, 15 August 2005 23:19
|
|
| Phat535 wrote on Tue, 16 August 2005 07:13 |
| oldcorollas wrote on Sun, 14 August 2005 17:47 |
dumb question.. are you doing compression test at WOT?
|
nope
|
i beleive that its common practice...do it.
|
|
|
Location:
Noosa
Registered:
November 2004
|
|
Re: Problem with my 4A-C .. any ideas?
|
Wed, 17 August 2005 05:34
|
|
Might pay too check why the fuel aint burning. Like check the distributer or spark plugs.
on another note ill give u $200 4 ur ae71 so pm me of sumthing
|
|
|
Location:
Coffs Harbour, NSW
Registered:
November 2004
|
|
Re: Problem with my 4A-C .. any ideas?
|
Wed, 17 August 2005 07:07
|
|
| Phat535 wrote on Tue, 16 August 2005 09:15 |
I'll even throw in a spare 4A-CE motor
|
|
|
|
Location:
Brisbane
Registered:
January 2004
|
|
Re: Problem with my 4A-C .. any ideas?
|
Wed, 17 August 2005 07:12
|
|
| skellator wrote on Wed, 17 August 2005 17:07 |
| Phat535 wrote on Tue, 16 August 2005 09:15 |
I'll even throw in a spare 4A-CE motor
|
|
?? I'm obviously missing something here
|
|
|
Location:
Coffs Harbour, NSW
Registered:
November 2004
|
|
|
Location:
Noosa
Registered:
November 2004
|
|
Re: Problem with my 4A-C .. any ideas?
|
Wed, 17 August 2005 21:49
|
|
Im still interested in the car.
btwis the motor in or out?
|
|
|
Location:
Brisbane
Registered:
January 2004
|
|
Re: Problem with my 4A-C .. any ideas?
|
Fri, 19 August 2005 01:12
|
|
|
haha yeah my bad
|
|
|
