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Mazda BT 50 & Pickup TrucksWhile Mazda may not be known for their trucks, they have always produced quality reliable trucks for both hauling cargo, or simply crusing. BT 50
Co and Hc are sky hi! Co over 9,9(should be 0.3)and HC over 999( should be 200).
lambda is 0,75( should be 0.97-1.03
-rough ide when engine is in working temp.
No fault codes trough diagnostic.
New spark plugs, new spark-lines
The B2600i is famous for a troublesome ECM in the fact that several of the factory supplied capacitors on the circuit board will leak acid and corrode the board......typically where the fuel injector circuits are located. If you have not pulled the ECM and had a look inside to see if there is corrosion on the circuit board, then I would take a look at it.
Also, the truck's Oxygen Sensor could be defective, and/or the Catalytic Converter may be bad.
How long have you owned the truck? What year is it? Where are you located (what country)? How many miles are on the truck?
The more info you can supply, the chances are better for some to provide any diagnosis of the problems.
Just bought it, and made a complete service with filter, oil, air filter, spark plugs etc
I will check the ecu
Welcome to the forum
Just and FYI ECU and OBDII systems were still in their beginning (obdII 1995) and the ECU did not have the full capability in the programing to report DTC. ECU started becoming more reliable with programing about 2000.
I would however based on the limited diagnostic information and having a few of these Mazda pass through the shop, consider the more possibility of an ECU replacement? But, naturally there are a list of checks to determine that and it does involve more checking parts.
I let that go to other members that have these model MAZDA continue the help...Just wanted to mention the ECU information.
Ecu apart, what should I look for? Edit: 280k miles, lost one 0 in the translation from km to miles
Visually it looks fine, unfortunately it takes a special ECU testing equipment to see if there is a problem. Basically, if the ECU is found corrupt it is generally scaped because the labor to replace specific parts are very hard and generally requires some experience in soldering circuit board components unfortunately many for this ECU are NLA new. You should use this as a core and hopefully the place you find that will exchange it will not reject the core because it has been opened.
You may be able to find a service shop that can do what is called a pass-through or reflash if they have the software for that old ECU.
B2600 High CO and HC
