1994 Jaguar XJ6 Cold starting

Tiny
RICHARD FRAZER
  • MEMBER
  • 1994 JAGUAR XJ6
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 80,000 MILES
I have a "94" XJ6 with a 4.0-6 cylinder that all the sudden will not fire up right away when cold. After I get it going it runs good and starts right up. I have tried the VCM, but get no problem code. Any answers?
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Sunday, August 24th, 2008 AT 5:11 PM

3 Replies

Tiny
JAMES W.
  • MEMBER
My first thought would be the coolant temp sensor telling the ECU that the engine is warmer than it is.
Therefore giving the engine too lean a fuel mixture to start. The CTS may be able to do this and still in range enough not to trip a VCM code. A quick test; find a vaccum port somewhere on the intake manifold. Where you can unplug a vaccum hose. Doing a cold start as the engine start as the motor starts to turn, spray a little shot of starting fluid or carb cleaner into this open port. I wouldn't do this ahead of the MAF meter. It might damage it. If i'm correct, the motor should pop right off. If it does, then I would look at the coolant sensor.
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Friday, October 3rd, 2008 AT 4:47 PM
Tiny
RICHARD FRAZER
  • MEMBER
Dear Jim, thanks for your reply. I just found it the other
day while cleaning out my e-mails. I decided to just replace the coolant temp sensor. No luck. The car still runs great and starts right up after even a short run time. I do know for a fact that the fuel pump is not engaging right away when the car is cold. It seems to take 5-7 cranks ( but not all the time? ) I have also replaced the fuel filter which did seem to help. What else ya got. I'll donate this time.
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Friday, October 24th, 2008 AT 1:50 PM
Tiny
JNOVACK
  • EXPERT
This is 16 things to check I would look towards #3 first

1 Inspect Fuel Filter Clogged or dirty fuel filter

2 Inspect Air Filter Restricted or clogged air filter.

3 Inspect Fuel Injector Cold Start Valve Faulty cold start valve or circuit.

4 Inspect Battery Damaged or faulty battery and/or connections.

5 Inspect Wireset Damaged, worn, or deteriorating spark plug or coil wire(s).

6 Inspect Spark Plug Fouled, damaged or broken spark plug(s).

7 Inspect Starter Damaged, worn, defective, or faulty starter or starter related circuit.

8 Inspect PCV Valve Plugged or damaged pcv valve.

9 Inspect Throttle Position Sensor Faulty throttle position sensor or throttle position sensor circuit.

10 Inspect Air Charge Sensor Damaged or faulty air charge sensor or air charge sensor circuit.

11 Inspect Air Cleaner Temperature Sensor Damaged or faulty air cleaner temperature sensor or air cleaner temperature sensor circuit.

12 Inspect Fuel Injector Pressure Regulator Faulty fuel injector pressure regulator or circuit.

13 Inspect Fuel Injector Plugged, dirty or poorly connected fuel injector.

14 Inspect MAP Sensor Improperly connected or faulty m.A.P. Sensor.

15 Inspect Mass Air Flow Sensor Improperly connected or faulty mass air flow sensor.

16 Inspect Fuel System Pressure Incorrect fuel pressure being delivered to carburetor or fuel injection system.
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Friday, October 24th, 2008 AT 6:42 PM

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