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Die Bosch D-Jetronic war 1967 die erste Großserien elektronische Einspritzung der Welt. - Bosch's D-Jetronic was the first mass-production electronic fuel injection.
Fuel Pressure, Lean mixture, pinging in Volvo 144 B20E
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30 Juni 2025 20:29 #23521
von nordfisch
nordfisch antwortete auf Fuel Pressure, Lean mixture, pinging in Volvo 144 B20E
Hi Chris,
are you sure you used the correct marks for the adjustment?
There are marks from -30° to +30°... and the distributor-cam turns counter-clockwise.
I think, I by myself could have been errated by this, because I almost ever worked on cars with the distributor-cam turning clockwise.
Regards
Norbert
are you sure you used the correct marks for the adjustment?
There are marks from -30° to +30°... and the distributor-cam turns counter-clockwise.
I think, I by myself could have been errated by this, because I almost ever worked on cars with the distributor-cam turning clockwise.
Regards
Norbert
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- Nailhead
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26 Juni 2026 17:51 #24975
von Nailhead
Nailhead antwortete auf Fuel Pressure, Lean mixture, pinging in Volvo 144 B20E
Dear Volker, I have still not solved the problem completely. I have worked intensely on it from time to time. Based on your suspicion about the pump not delivering what it should I have traced and cleaned all contacts through all wiring to the fuel pump and the relay. That did something good and the pump sounds like it gets enough power. It delivers a bit over 1000 cc in 30 sec, and thus fulfils the spec. However - and here comes the real question; I discovered the charging relay on the Motorola SEV generator was burned of and it delivered almost 16 volts on the battery (15,7V in idle and 15,9 in revolutions) can that in anyway have damaged the ECU or sensors governing the mixture in your experience?
Thank you for your time and effort
Thank you for your time and effort
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26 Juni 2026 19:24 - 26 Juni 2026 19:25 #24976
von Nailhead
Nailhead antwortete auf Fuel Pressure, Lean mixture, pinging in Volvo 144 B20E
I am however doubtfull if I have a false air leak some where I cannot detect - I have tightened all malifold bolts - again - and checked the AAV function again. But still - when I set the throttle clap as per std settings I have to close the idle pinbolt completely before it drops in revolutions to a proper level. It also boggs quite a bit in the first few degrees of throttle movement, until it picks up speed. Anybodu have a good idea about where I shall look for false air?
Letzte Änderung: 26 Juni 2026 19:25 von Nailhead.
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