RPM drops on startup and car usually stalls (hot or cold). Idle fine otherwise.
#21
You can hotwire the fuel pump to stay on by bringing power to the forward most # 1 pump relay socket ( this would verify relay control issues like M'Lady P. had when I bought her .
High current hazard so use a blade type connector in the relay and the last arcing contact at the battery
You may have something intermittent like on mine .
The # 2 pump does not turn on until 4000 RPM and back off at 3200
You can jumper the # 2 pump as well but mine does not have one so I can't tell you the physical location of the socket you want to put power into just that it is a heavy Blue / Red one
Last edited by Lady Penelope; 01-05-2018 at 07:14 PM.
#22
I'll let you know about the 3 clicks on the relay when I get a chance. Need somebody to stand in very very cold weather outside with me
thanks,
John
#23
No , you can put a temporary clip on the battery or rear fuse box terminal . Mine was wired though the accessory relay socket position as I got it and was live with the key switch , found the original fault was in the relay control circuit repaired back to the designed # 1 pump relay . Their repair was faulty as the rubber glue on the black electrical tape migrated into the twisted conductor wires .
The test configuration can be used as a temporary fix , but it will be live at all times .
You can do the # 2 pump the same way on your SC model .
One of the pumps should work with the matter of the one fuel filter to consider , easy change when warm .
Any questions . just ask . My original owners fault was with the RS3 connector pin 22 that goes through the behind right fwd wheel well .
This is in no means the magic bullet , but eliminates some things toward your resolution .
The test configuration can be used as a temporary fix , but it will be live at all times .
You can do the # 2 pump the same way on your SC model .
One of the pumps should work with the matter of the one fuel filter to consider , easy change when warm .
Any questions . just ask . My original owners fault was with the RS3 connector pin 22 that goes through the behind right fwd wheel well .
This is in no means the magic bullet , but eliminates some things toward your resolution .
Last edited by Lady Penelope; 01-06-2018 at 06:58 PM.
#24
I did the fuel pump relay test... all fine on that end.
The "stall on very cold weather" is I think due to a clogged exhaust...ice collecting somewhere. Here it is explained.
https://www.jaguarforums.com/forum/x...orking-108330/
I did upgrade to a new computer ECU with latest EPROM and that might have solved the stall on warm weather. Now getting a P0500 (bad wheel speed sensor) and P0123 (Throttle out of range) with new computer but all runs great, I guess I need TPS calibration but don't know anybody with the PDU...
Thanks!~
The "stall on very cold weather" is I think due to a clogged exhaust...ice collecting somewhere. Here it is explained.
https://www.jaguarforums.com/forum/x...orking-108330/
I did upgrade to a new computer ECU with latest EPROM and that might have solved the stall on warm weather. Now getting a P0500 (bad wheel speed sensor) and P0123 (Throttle out of range) with new computer but all runs great, I guess I need TPS calibration but don't know anybody with the PDU...
Thanks!~
#25
The green / yellow wire should read 0.60 volts + or - 0.02 volts with the key in the on position and engine not running . As you slowly twist the butterfly you should see a steady climbing voltage and no bips to zero . Best seen on a old school needle meter .
With the P0500 you can remove and clean the face of the sensors as they get clouded over with debris . The sensors will read about 1300 ohms as a fundamental test , not a functional test . The pairs are marked as a color group in the print .
With the P0500 you can remove and clean the face of the sensors as they get clouded over with debris . The sensors will read about 1300 ohms as a fundamental test , not a functional test . The pairs are marked as a color group in the print .
Last edited by Lady Penelope; 01-09-2018 at 11:08 PM.
#26
#27
Thanks for the tips. The new Throttle Position Sensor error code is only present with the new ECU (with very latest AL EPROM) so I imagine a Throttle Adaptation Reset would fix it. The Speed Sensor error was not present with my 2 other ECU's...but likely related to my ABS Light on. The Speed Sensors are rusted tight in rotors with no way to remove...
No big deal. ABS Light usually goes on above freezing temp, stays off when very cold so obviously a bad connection/solder joint and I plan to eventually replace ABS unit also.
I drilled some weep/drain holes in my muffler...lots of water seeping out (first time in 30 days that the temperature is above freezing. And I keep the car outside all the time).
No big deal. ABS Light usually goes on above freezing temp, stays off when very cold so obviously a bad connection/solder joint and I plan to eventually replace ABS unit also.
I drilled some weep/drain holes in my muffler...lots of water seeping out (first time in 30 days that the temperature is above freezing. And I keep the car outside all the time).
Last edited by madijag; 01-10-2018 at 08:09 AM.
#28
So as a summary: the car would stall on startup without gas pedal pumping. This happened with 2 different ECUs (AH EPROM). With the other ECU (newest EPROM AL) the stall hasn't happened again.
The no-start condition was due to a muffler clogged with ice.
I am also inclined to think that the catalytic converter (probably original from 1995) is useless, half-clogged and possibly causing the stall problems. That's for another thread.
The no-start condition was due to a muffler clogged with ice.
I am also inclined to think that the catalytic converter (probably original from 1995) is useless, half-clogged and possibly causing the stall problems. That's for another thread.
#29
I did the fuel pump relay test... all fine on that end.
The "stall on very cold weather" is I think due to a clogged exhaust...ice collecting somewhere. Here it is explained.
https://www.jaguarforums.com/forum/x...orking-108330/
I did upgrade to a new computer ECU with latest EPROM and that might have solved the stall on warm weather. Now getting a P0500 (bad wheel speed sensor) and P0123 (Throttle out of range) with new computer but all runs great, I guess I need TPS calibration but don't know anybody with the PDU...
Thanks!~
The "stall on very cold weather" is I think due to a clogged exhaust...ice collecting somewhere. Here it is explained.
https://www.jaguarforums.com/forum/x...orking-108330/
I did upgrade to a new computer ECU with latest EPROM and that might have solved the stall on warm weather. Now getting a P0500 (bad wheel speed sensor) and P0123 (Throttle out of range) with new computer but all runs great, I guess I need TPS calibration but don't know anybody with the PDU...
Thanks!~
#30