OBD Error codes Misfire Fuel, Help Please
#1
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I have just strated the XJR up which has been stood for some time, a new battery has been fitted and the following codes have been reported from my OBD2 reader
Can you point me in the right direction to look for these faaults, could they all be related to one fault, air leak? or something
Short Term Fuel Trim Bank 1 - 4.69% Lean
Short Term Fuel Trim Bank 2 - 0.00%
Long Term Fuel Trim Bank 1 - 4.69% Rich
Long Term Fuel Trim Bank 2 - 14.84% Rich
Fuel System 1 Status - Open Loop Control due to System Fault
Fuel System 2 Status - Open Loop Control due to System Fault
P0300 - Random/Multiple cylinder misfire Detected
P1316 - Fault definition not available or manufacturer specific
P0205 - Injector circuit malfunction - Cylinder 5
Can you point me in the right direction to look for these faaults, could they all be related to one fault, air leak? or something
Short Term Fuel Trim Bank 1 - 4.69% Lean
Short Term Fuel Trim Bank 2 - 0.00%
Long Term Fuel Trim Bank 1 - 4.69% Rich
Long Term Fuel Trim Bank 2 - 14.84% Rich
Fuel System 1 Status - Open Loop Control due to System Fault
Fuel System 2 Status - Open Loop Control due to System Fault
P0300 - Random/Multiple cylinder misfire Detected
P1316 - Fault definition not available or manufacturer specific
P0205 - Injector circuit malfunction - Cylinder 5
#2
#3
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After doing some general investigation I have found 5 rocker cover bolts missing which could cause a significant vacuum leak, I have ordered new bolts which should be delivered next week, I also found a bend/fracture in the oil dipstick pipe, this also had a hole in it, so I will be making a smoke tester once I have the new parts to see if there is any more air leaks.
I presume the clicking will be the injector firing? i'll take a look at that once the other jobs are done
I presume the clicking will be the injector firing? i'll take a look at that once the other jobs are done
Last edited by RoyLittle0; 08-26-2018 at 03:15 AM.
#4
#5
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Yes, the clicking would be the sound of the solenoid in the injector. It is easy to hear with a cheap mechanics stethoscope. But, based on your last post you will probably find the injector is fine but still it is a easy thing to check and eliminate.
I have been very successful using carb cleaner to find vacuum leaks. Check the seal of the injector into the intake. I had this problem on mine once because I didn't get a couple of the injectors seated properly into the intake. I sprayed carb cleaner at the base of the injector and could hear the sound of the engine slightly change.
I have been very successful using carb cleaner to find vacuum leaks. Check the seal of the injector into the intake. I had this problem on mine once because I didn't get a couple of the injectors seated properly into the intake. I sprayed carb cleaner at the base of the injector and could hear the sound of the engine slightly change.
#6
#7
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Well today I have received most of the parts I needed to get the job done
I had an almighty pain replacing the dipstick, I ended up draining the oil and poking a wire up through the sump and threading the pip around that, I needed to change the oil and filter so I had everything here ready, But Job done.
The remaining rocker cover bolts have been replaced and the Misfire on cylinder 5 was traced to a chewed cable (Rats!!!), this was repaired and that fault has been cleared
So the original faults were cleared and now I have P0308 - Cylinder 8 Misfire and P1316
Short Term Fuel Trim Bank 1 - 0.78% Lean
Short Term Fuel Trim Bank 2 - 0.78% Lean
Long Term Fuel Trim Bank 1 - 4.69% Lean
Long Term Fuel Trim Bank 2 - 2.34% Rich
Whilst I had the car on jacks and the wheel off I replaced all the ABS sensors on the wheels, this was because I have restricted performance due to Traction Control Fail and Stability Control Fail, I still have this problem unfortunatly
I had an almighty pain replacing the dipstick, I ended up draining the oil and poking a wire up through the sump and threading the pip around that, I needed to change the oil and filter so I had everything here ready, But Job done.
The remaining rocker cover bolts have been replaced and the Misfire on cylinder 5 was traced to a chewed cable (Rats!!!), this was repaired and that fault has been cleared
So the original faults were cleared and now I have P0308 - Cylinder 8 Misfire and P1316
Short Term Fuel Trim Bank 1 - 0.78% Lean
Short Term Fuel Trim Bank 2 - 0.78% Lean
Long Term Fuel Trim Bank 1 - 4.69% Lean
Long Term Fuel Trim Bank 2 - 2.34% Rich
Whilst I had the car on jacks and the wheel off I replaced all the ABS sensors on the wheels, this was because I have restricted performance due to Traction Control Fail and Stability Control Fail, I still have this problem unfortunatly
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#8
#9
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I have checked with another OBD11 reader and the faults that show are P1637 and P1720
P1637 = CAN Link ECM/ABSCM Circuit/Network Malfunction
P1720 = Vehicle Speed (Meter) Circuit
What brake switch are you referring to??
Last edited by RoyLittle0; 08-28-2018 at 12:30 PM.
#10
#11
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So far the P1720 has cleared and was probably left over from the old battery. the P1637 was from a cheap hand held OBD reader, so no codes left as such.
I have tested the sensors back to the controller and all is fine with them, the problem I found was the connection through the ignition switch wasn't good, I wasn't getting a good clean ground from the ignition to the ABS unit, I have ordered a new ignition switch to see if that will solve the issue
I have tested the sensors back to the controller and all is fine with them, the problem I found was the connection through the ignition switch wasn't good, I wasn't getting a good clean ground from the ignition to the ABS unit, I have ordered a new ignition switch to see if that will solve the issue
#12
![Default](/forum/images/icons/icon1.gif)
After doing some general investigation I have found 5 rocker cover bolts missing which could cause a significant vacuum leak, I have ordered new bolts which should be delivered next week, I also found a bend/fracture in the oil dipstick pipe, this also had a hole in it, so I will be making a smoke tester once I have the new parts to see if there is any more air leaks.
I presume the clicking will be the injector firing? i'll take a look at that once the other jobs are done
I presume the clicking will be the injector firing? i'll take a look at that once the other jobs are done
#13
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https://www.ebay.co.uk/itm/CAMSHAFT-...53.m2749.l2649
This is the bolt location on one side only, I found them missing on the other bank but the locations are the same
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Last edited by RoyLittle0; 09-05-2018 at 04:50 AM.
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