where is knock sensor? and ESC module?
03-10-2009, 03:26 PM
#1
Drifting
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where is knock sensor? and ESC module?
Is knock sensor opposite my water coolant temp sensor? and is the ESC behind the bread box passenger side?
I'm getting a ESC code and car is running like crap, but was perfectly fine a few weeks ago.
'86 L98
I'm getting a ESC code and car is running like crap, but was perfectly fine a few weeks ago.
'86 L98
03-10-2009, 03:50 PM
#2
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the knock sensor is down by the the starter, a little in front of it, threaded into the block just above the oil pan, it has a 1 pin connector and its round, kinda hard to see.. not sure on the esc, I'd havta dig a manual out.. my car was kinda lacking parts when I got it..
03-10-2009, 04:30 PM
#4
Le Mans Master
It's under the hood, passenger side, near the firewall, mounted behind the front tire. A little rearward of the hood latch. About the size of half a pack of cigarettes.
Hard for me to describe where it's mounted.
Jake
West Point ROCKS!
Last edited by JAKE; 03-10-2009 at 05:27 PM. Reason: Change above to behind
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03-10-2009, 05:00 PM
#7
Le Mans Master
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HiHp63 (04-11-2021)
03-13-2009, 05:06 AM
#13
Safety Car
The knock sensor is used for the drain plug passenger side if you remove it coolant will flow from the hole, There should be a fitting with a bolt on drivers side
03-13-2009, 09:54 AM
#14
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When you go to remove the knock sensor, take care you don't break the plastic nipple (acoustic coupler) thingie that surrounds the sensor electrode. One slip of your box-ended wrench and BLOOP! It's done for.
You can use a pair of vice clamp to get a good bite on the circular part of the sensor to coax it out if need be. Be sure and re-torque the sensor to FSM specs. since it needs to be adequately installed to listen for spark knock.
I believe it's 13 or 15 lbs. but someone who knows for sure chime in.
You can use a pair of vice clamp to get a good bite on the circular part of the sensor to coax it out if need be. Be sure and re-torque the sensor to FSM specs. since it needs to be adequately installed to listen for spark knock.
I believe it's 13 or 15 lbs. but someone who knows for sure chime in.
03-13-2009, 03:49 PM
#15
Le Mans Master
To drain the coolant from the block, I've used the Knock Sensor on the passenger side and the oil coolant fitting on the driver's side. But that was on the L98 and 400 blocks.
I haven't had to drain my LT1 block yet, but if I do, I'll look for the knock sensors and/or screw in plugs.
Jake
West Point ROCKS!
I haven't had to drain my LT1 block yet, but if I do, I'll look for the knock sensors and/or screw in plugs.
Jake
West Point ROCKS!
03-13-2009, 08:20 PM
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03-14-2009, 11:14 AM
#17
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Does it really matter? Put it in til it's tight.. Just because you HAVE a torque spec for something doesn't mean it's absolutely critical.. I doubt few people have ever installed a knock sensor with a torque wrench..
03-15-2009, 12:13 AM
#19
Le Mans Master
The FSM for the 86 Vette sets the torque spec at 14 ft./lbs.
It also calls for thread sealer, such teflon tape, on the sensor threads. GM changed the tape recommendation in later year Vettes, but I don't recall which year it was changed.
Jake
West Point ROCKS!
It also calls for thread sealer, such teflon tape, on the sensor threads. GM changed the tape recommendation in later year Vettes, but I don't recall which year it was changed.
Jake
West Point ROCKS!
03-15-2009, 01:43 AM
#20
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That's one of the few things you ever see someone in the shop pull a torque wrench out for. It's important to torque head bolts to spec. If you ever had an engine replaced under warranty at a gm dealer I can almost guarantee the knock sensor wasn't torqued to spec, along with all of the other sensors. I know I've never bothered to on any engine I've ever done at work, never saw anyone else do it either. Can't say it's ever been an issue. There are probably some guys out there that do it though, who knows.. If you arn't sure how tight to make it a torque wrench defently wouldn't hurt though..
