| Subject | Date Asked | Expert |
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| 1985 XJS HE | 8/28/2008 | Howard M. Fitzcharles III |
Q: The car has 40,000 miles it starts and seems to run fine but while driving it will just die. You can ...
A: Jeff, the timing light test tells you if it is in the ignition and the LED test tells you if it is ...
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| 1985 XJS HE | 8/27/2008 | Howard M. Fitzcharles III |
Q: The car has 40,000 miles it starts and seems to run fine but while driving it will just die. You can ...
A: The fact that it quits narrows the problem down to only a million things. It is no use testing when ...
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| 87 XJ6 Starts fine, dies in gear (part 4): | 8/26/2008 | Howard M. Fitzcharles III |
Q: Speedo says 110k miles, but I'm sure it is closer to 130+k. My car suffers from the non-working ...
A: It usually effects the lower RPM range but can effect it up higher as the fuel that goes into the ...
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| Wiper relay location | 8/21/2008 | Howard M. Fitzcharles III |
Q: I have an 86 XJS and the wipers are not working. I would like to know where the wiper relay is ...
A: The power to the wipers goes to the wiper switch by a light green wire and on to the wiper motor and ...
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| 87 XJ6 Starts fine, dies in gear (part 4): | 8/21/2008 | Howard M. Fitzcharles III |
Q: Speedo says 110k miles, but I'm sure it is closer to 130+k. My car suffers from the non-working ...
A: The bore scope will tell the tail. I pulled one Jag down that had so much carbon on the intake valve ...
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| A/C | 8/20/2008 | Howard M. Fitzcharles III |
Q: Howard, on my question, I fogot to tell you that it is about a 1986 Jaguar XJS. Howard, when I turn ...
A: Yes, the doors are controlled by vacuum motors and the vacuum motors are controlled by two vacuum ...
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| 87 XJ6 Starts fine, dies in gear (part 4): | 8/20/2008 | Howard M. Fitzcharles III |
Q: Speedo says 110k miles, but I'm sure it is closer to 130+k. My car suffers from the non-working ...
A: Dave, it is a lot of work to do a valve job on a Jag as compared to a domestic V-8. So you want to ...
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| 87 XJ6 Starts fine, dies in gear (part 3) | 8/19/2008 | Howard M. Fitzcharles III |
Q: I removed/cleaned the throttle, oil breather screen and tubes. I also removed the oil in the intake ...
A: Dave, the regulator does operate when the pump is on because most of the fuel that is pumped up to ...
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| 87 XJ6 Starts fine, dies in gear (part 3) | 8/18/2008 | Howard M. Fitzcharles III |
Q: I removed/cleaned the throttle, oil breather screen and tubes. I also removed the oil in the intake ...
A: Dave, you already got a reading from the 0/2 sensor why do you not believe what it tells you? Clean ...
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| 87 XJ6 Starts fine, dies in gear (part 3) | 8/18/2008 | Howard M. Fitzcharles III |
Q: I removed/cleaned the throttle, oil breather screen and tubes. I also removed the oil in the intake ...
A: The compression readings look ok but the 0/2 readings of .75 v(unplugged)if this was a warmed up ...
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| 87 XJ6 Start fine, dies in gear (part 2) | 8/15/2008 | Howard M. Fitzcharles III |
Q: I finally found time to work on my car again ('87 XJ6). I have a friend with a parts car and I ...
A: A regular volt meter can check O 2 out put.(blue wire) .5 volts = normal and a lean voltage = a lean ...
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| 87 XJ6 Start fine, dies in gear (part 2) | 8/14/2008 | Howard M. Fitzcharles III |
Q: I finally found time to work on my car again ('87 XJ6). I have a friend with a parts car and I ...
A: Dave, the only other things I can think to look at is manifold vacuum and if you have a bore scope ...
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| 1987 XJ6 Rough Idle, Sputter, and Die | 8/12/2008 | Howard M. Fitzcharles III |
Q: I am the original owner of a 1987 XJ6 with 13,000 miles. It ran fine until recently. Now it starts ...
A: If you had the throttle open on the test of #3 & 4 and the wet test was about the same, it is an ...
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| 1987 XJ6 Rough Idle, Sputter, and Die | 8/12/2008 | Howard M. Fitzcharles III |
Q: I am the original owner of a 1987 XJ6 with 13,000 miles. It ran fine until recently. Now it starts ...
A: All of the symptoms are useless information other than to tell you you need to run tests. Yes, fuel ...
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| 87 XJ6 Start fine, dies in gear (part 2) | 8/11/2008 | Howard M. Fitzcharles III |
Q: I finally found time to work on my car again ('87 XJ6). I have a friend with a parts car and I ...
A: No code system on this car. But you need to quit throwing parts at it until you test to see what is ...
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| '85 XJ6 passenger side windows | 8/8/2008 | Howard M. Fitzcharles III |
Q: My '85 XJ6 passenger side windows will not operate. The driver's side windows and sunroof are fine. ...
A: The left window would not operate if the relay had failed check the red w/slate tracer wire with the ...
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| '85 XJ6 passenger side windows | 8/8/2008 | Howard M. Fitzcharles III |
Q: My '85 XJ6 passenger side windows will not operate. The driver's side windows and sunroof are fine. ...
A: I found that most of the time when a window quits working, it was the rocker switch that failed and ...
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| Series III ignition advance | 8/8/2008 | Howard M. Fitzcharles III |
Q: I have an e type fitted with a 1987 series III 4.2 XJ6 engine. The engine is fitted with triple SU's ...
A: They are telling you how to set it. Max performance on any engine is to set the timing advanced to ...
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| '86 XJ6 AC Center Dashboard Vent | 8/4/2008 | Howard M. Fitzcharles III |
Q: My AC Center Dashboard Vent does not blow no matter what switch settings I use. Cool air does ...
A: I am not familiar with any limit switch. The vacuum valve is on the cylinder that rotates by a small ...
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| '86 XJ6 AC Center Dashboard Vent | 8/4/2008 | Howard M. Fitzcharles III |
Q: My AC Center Dashboard Vent does not blow no matter what switch settings I use. Cool air does ...
A: Set the controls to "Auto" speed control and "65" degrees on the temperature control and run for 5 ...
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| 1984 XJ6 Vanden Plas | 8/3/2008 | Howard M. Fitzcharles III |
Q: HELP! My jag is giving me about 8 MI. to the gallon and it idles very rough....where do I start? ...
A: Poor fuel mileage and rough running can be caused by a thousand things so you need to do some ...
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| XJ6 hazard/turn signals | 7/27/2008 | Howard M. Fitzcharles III |
Q: i tried to test my 86 xj6 S3 flasher relay and do not have power coming into the flasher relay at ...
A: Yes Rick, the hazard switch does have an effect on turn signals. Go to my web site and copy the ...
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| XJ6 hazard/turn signals | 7/27/2008 | Howard M. Fitzcharles III |
Q: i tried to test my 86 xj6 S3 flasher relay and do not have power coming into the flasher relay at ...
A: There is one power sources for the flasher unit. Light green w/pink tracer wire to the #49 pin on ...
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| mechanic | 7/20/2008 | Howard M. Fitzcharles III |
Q: I'm looking to buy a Jaguar from a used dealer, but want to have it checked out by a mechanic first. ...
A: It depends on what year model it is. If it is a 2000 or newer you are best off taking it to the ...
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| XJ6 idles fine, dies in gear | 7/20/2008 | Howard M. Fitzcharles III |
Q: I have an 87 XJ6-probably about 150Kmiles- that starts, idles and drives fine for about a minute, ...
A: This car has the Bosch "L" jetronic injection system and there are some tests that need to be done ...
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| xk120 overcharging | 7/17/2008 | Howard M. Fitzcharles III |
Q: 1953 xk120 Generator output good.1500 rpm up the ammeter will go to 20-25 amps.Headlights will bring ...
A: You are quoting amperage. Amperage is 100% dependent on load. Voltage is the push (charging system) ...
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| 86 XJS V12 Won't turn over | 7/16/2008 | Howard M. Fitzcharles III |
Q: I have recently purchased an 86 XJS V12. The starter is not operating. I do hear a clicking sound ...
A: You should check the solenoid first. Just because it made a "Click" does not mean it connected the ...
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| 86 XJS V12 Won't turn over | 7/15/2008 | Howard M. Fitzcharles III |
Q: I have recently purchased an 86 XJS V12. The starter is not operating. I do hear a clicking sound ...
A: No Buck, it's not normal. But you do need to determine if it is the relay clicking or the starter ...
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| Fuel pump 84 xjs | 7/13/2008 | Howard M. Fitzcharles III |
Q: When trying to start the engine the fuel pump never goes off and im afraid of engine damage from ...
A: For the fuel pump to continue to run after turning off the ignition switch, the fuel pump relay must ...
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| compression in cylinders | 7/13/2008 | Howard M. Fitzcharles III |
Q: The [a] bank was almost all lower than the [b] bank by 30 lbs. Some were at 150 some as high as ...
A: Bill, give me the compression readings on each cylinder and did you hold the throttle open on these ...
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| 85 XJ6 w/ chevy 350 AC problem | 7/9/2008 | Howard M. Fitzcharles III |
Q: Car has a chevy 350 and GM AC unit. AC unit works when we apply power to the unit however, using ...
A: Unit?? What unit? do you mean the compressor clutch? If that is what you are talking about, there ...
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| 1985 jag xj6 rebuild head | 7/9/2008 | Howard M. Fitzcharles III |
Q: Ive been away for the pass couple of days so haven't tried your suggestion yet. I will be on ...
A: Sorry I was not clear on that, I meant it was going to take me several days to locate and post the ...
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| 1985 XJ6 | 7/6/2008 | Howard M. Fitzcharles III |
Q: Ihave just had the head rebuilt and installed. Everything went back together OK, but the engine will ...
A: It is unlikely a vacuum leak that is causing the high RPM problem although it may be the low RPM ...
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| 86 xjs v12 tail lights | 7/2/2008 | Howard M. Fitzcharles III |
Q: I bought a 1986 xjs v12 no tail lights please tell me all that could be wrong.What I could check. ...
A: First check for power at the bulb socket and their grounds. Then if your license lights are out too, ...
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| XK120 Brakes not releaseing | 6/30/2008 | Howard M. Fitzcharles III |
Q: After I have been driving my car for about 20 minutes or so, the front brakes seem to hand up (not ...
A: As I remember the 120 had a two stage master cylinder. Two different sized bores in one cylinder on ...
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| 1974.E type, V12, miss fires | 6/30/2008 | Howard M. Fitzcharles III |
Q: My 1974,V12, E type will miss fire when left to idle for a few minutes after the engine has reached ...
A: There are several methods that mechanics use to test for vacuum leaks and some use a combination of ...
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| 1974.E type, V12, miss fires | 6/30/2008 | Howard M. Fitzcharles III |
Q: My 1974,V12, E type will miss fire when left to idle for a few minutes after the engine has reached ...
A: The bypass valve is a decel valve and will not cause no vacuum. To disable it for test purposes, you ...
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| remove/replace engine | 6/27/2008 | Howard M. Fitzcharles III |
Q: This is a followup to a previously answered question. I asked about removing and replacing an engine ...
A: Bill, the only expense would be if you have a shop do the change and that depends on the shop. A Jag ...
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| 1985 XJS gas in the oil | 6/25/2008 | Howard M. Fitzcharles III |
Q: What might cause gas in the oil that blows out of the exhaust..Injectors maybe?? ANSWER: Hi Bill, ...
A: You didn't tell me if it passed emission tests. It is a lot of work to pull all the injectors out to ...
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| 1985 XJS gas in the oil | 6/24/2008 | Howard M. Fitzcharles III |
Q: What might cause gas in the oil that blows out of the exhaust..Injectors maybe??
A: You will have to clear that up a little for me. "gas in the oil that blows out of the exhaust" ...
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