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2000 Jaguar S-Type engine missfire/ heater, air dont work

Tiny
TRUESCO1
  • MEMBER
  • 2000 JAGUAR S-TYPE
  • V8
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
Heys guys.

The engine size is a 4.0. She is missing in park as well as driving. The check engine light is on soild most time but does flash as well. Im assuming its the coils and plugs. I havent gotten a DT done yet but thinking I might to norrow done the problem.

As for the heat and ac there isnt any. It does blow air but does not get hot or cold when levels are adjusted. Tempture gauge has been replaced.

Seems like a pretty easy fix but any info (pictures are great) would be fantastic.

CheerZ
Larry
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Thursday, September 24th, 2009 AT 12:54 AM

12 Replies

Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
We have two problems.
Number one, she is missing as well as in park or driving, we definitly need code(s) to narrow the problem down.
It could be from random misfire, misfire in cylinder 1 or 2. Or the evaporation system is defective, such as canister valve or the solenoid.

Number two, the heater control valve may be the problem, locate it.
Under evap by radiator fan, there should be three on that holder for the engine cooling fan, heater valve and heater pump. Disconnect the heater valve.
The climate control module opens or closes the heater control vavle based on evap and heater temp and the commanded temp. If you disconnect the heater valve the valve will default to full open. If you still do not have heat then the valve may be the problem.
If the valve is good, then the control module, a faulty evap temp sensor or heater temp sensor may be the problem.
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Saturday, September 26th, 2009 AT 3:05 PM
Tiny
TRUESCO1
  • MEMBER
  • 7 POSTS
I went to get it scanned and it wouldnt read anything, I checked all the fuses and they all where good, so know idea why it wont read anything.

I bought all new coils and plugs, as soon as the coils arrive I will install them and see if it changes anything. I will also check the heater controll valve at that time.
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Tuesday, September 29th, 2009 AT 5:10 PM
Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
Sometime the dtc connector can be bad, squeeze it between your finger, if it soft, then the problem is there. Or it has been diagnose with wrong cartrige.

When changing the spark pluggs, note there colors and let me know.
You did right thing to change the coil and spark plugs.
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Tuesday, September 29th, 2009 AT 5:24 PM
Tiny
TRUESCO1
  • MEMBER
  • 7 POSTS
Well I changed the ignition coils and she runs perfect also the check engine light went off on its own.

Now for my heating problem - heater control valve is located under the evap by radiator fan, the three on that holder are engine cooling fan, heater valve and heater pump, now im assuming the middle one is the heater controll value? Also is this on the passangers side of the car ( just double checking as im not even sure what the eyap looks like, I think its on the passangers side)
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Thursday, November 12th, 2009 AT 1:41 AM
Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
It is fitted on the radiator fan housing - biased to right hand side of car(yes, passenger side).
If you follow the alloy coolant pipes on the right hand inner wing - you will see it split off to 2 rubber hoses which will lead you to the heater control valve.
This can cause heating problems as well as ac problems.
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Thursday, November 12th, 2009 AT 7:04 AM
Tiny
TRUESCO1
  • MEMBER
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Ok I checked the heater control valve. What is the module located just above it? Once I unplug that one my heat came on (not the heater control valve)
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Thursday, November 12th, 2009 AT 8:40 PM
Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
I'm happy you got your heat back, ready for winter :-)
yes just above it, what is wrong with your module?
Do not unplug any module without diconnecting the battery first.
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Friday, November 13th, 2009 AT 12:52 AM
Tiny
TRUESCO1
  • MEMBER
  • 7 POSTS
Im not sure what it is called but it also has two hoses attached to it and a electrical plug in on top, that is the plug that I unpluged to make the heat work. What is that module called? Its pretty much right beside the ac condensor.
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Friday, November 13th, 2009 AT 1:25 AM
Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
The one you unplug might be your Expansion valve manifold and tube and cap ports.
There is no diagram about the module you mention beside the condenser.
If you can trace any wire from the part you mentioned to a well known part. Then that can help.
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Friday, November 13th, 2009 AT 7:47 AM
Tiny
TRUESCO1
  • MEMBER
  • 7 POSTS
Ill do one better and take a picture of it for you later today.
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Friday, November 13th, 2009 AT 8:37 AM
Tiny
MATHIASO
  • MECHANIC
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Yes, do that.
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Friday, November 13th, 2009 AT 10:40 AM
Tiny
TRUESCO1
  • MEMBER
  • 7 POSTS
Here is a picture of the part i unpluged (Heater Circulation Auxillary Pump I think??) and warmer air started coming out.


https://www.2carpros.com/forum/automotive_pictures/413188_BNEVJwmkKGrHgoHEMEjlLluimHBJn0RjKeWg_35_1.jpg

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Saturday, November 14th, 2009 AT 11:35 AM

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