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Calling the list for help again; 1993 945T around 173k miles. Please see my post yesterday, subject '1993 945T: Fault code 144'.
I had the garage replace the fuel filter (not throwing parts at the car; the filter is loooong overdue) and timing belt and tensioner (ditto.) The mechanic noticed what appeared to be moisture condensation inside the distributor cap.
The car was then driven about 40 highway miles fine. However, near the end of the trip the engine stalled once, Check Engine light went on, but started up again right away, and there did not seem to be a loss of power. I pulled the following fault codes: 3-1-2 (socket A2) and 1-4-4 again (socket A6).
Code 1-4-4*:
- No load signal from fuel injection system
- Faulty wiring from LH to EZK; bad LH module
- Engine lacks power; stalls; doesn't start or is jerky
Code 3-1-2:
- Signal missing for knock-related fuel enrichment
- Wiring break between EZK terminal 4 and FI #28
- No faults evident
Recent history: About two weeks ago the engine slightly overheated due to a massive coolant loss because one of the radiator side tank developed a crack (Nissens.) OBD gave codes 1-2-3 (ECT signal missing, to/from), 2-2-4 (ECT signal missing/faulty), and 3-1-2. Replaced the radiator, cleared codes, and had logged about 1000 miles without inceidence until yesterday.
My questions are:
1. What exactly does it mean by "No load signal"?
2. Where are the components (for what matter, connectors)?
Please help, this is my better half's daily driver. I consider myself handy, and have access to meters and scopes (if that help), but don't have tons of time at hand. If there do no seem to be straightforward diagnostic procedures/fixes I will have to take it to a Volvo garage.
Much TIA,
Lih-Yen
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