1987 Volvo 740 GLE -- Knock sensor problem.

  • Thread starter Thread starter jamiebabineaux
  • Start date Start date
J

jamiebabineaux

While replacing the breather box I broke the connection to the knock
sensor. I soldered the pins back in place and the car idles and runs
seemingly fine, but my mechanic noticed what he described as a lot of
engine noise and a knock.

Would a damaged knock sensor do this, and am I risking damage to my
engine if this solder job isn't adequate? What exactly does a knock
sensor do?

Thanks!
 
While replacing the breather box I broke the connection to the knock
sensor. I soldered the pins back in place and the car idles and runs
seemingly fine, but my mechanic noticed what he described as a lot of
engine noise and a knock.

Would a damaged knock sensor do this, and am I risking damage to my
engine if this solder job isn't adequate? What exactly does a knock
sensor do?

Thanks!
Click to expand...


At the top of my web page there are links on some articles on engine knock.
Your mechanics observation needs to be questioned. Did he drive the car at
heavy load when he observed the "knock"?



Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs (among other things) http://www.viatrack.ca

void _-void-_ in the obvious place
 
When I broke off the knock sensor wire, I couldn't keep the car
running. It would idle then die, or let me pump the gas and rev it up,
then it would die. When I soldered the sensor back together it ran
pretty well, but made a knock every so often.

I think the mechanic heard this knock too. I bought a new sensor ($77),
and we'll install it tomorrow. Mine had no plastic housing and was just
metal and prongs.

When I last spoke with him the compression check was 175, 175, 165 with
one more to go.

I hope the new sensor helps and he says the engine has more life.

Just FYI, this mechanic is a friend of my neighbor who does this in his
spare time and has many excellent references. When he mentioned the
knock, it was when he came to pick up the car and trailer it to his
house to fix it for me. It was a quick assessment.

(fingers crossed)

Jamie
 
When I broke off the knock sensor wire, I couldn't keep the car
running. It would idle then die, or let me pump the gas and rev it up,
then it would die. When I soldered the sensor back together it ran
pretty well, but made a knock every so often.

I think the mechanic heard this knock too. I bought a new sensor ($77),
and we'll install it tomorrow. Mine had no plastic housing and was just
metal and prongs.
Click to expand...


Ouch! You should have a look at this place
http://catalog.alloemvolvoparts.com/

Much more reasonable prices on that sort of thing.
 
Thanks!
I hated paying premium, but when the car is on the rack and timing is
critical, I bought it. But, I will definitely use this site in the
future.

IPDusa.com looked good, too, but the shipping looked a bit expensive.

Thanks!
 
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