I heard trackers have ECU issues. Similar to Honda Auto ecu's and mazda B series truck ecu's

anyone know anything about tracker ecu's going bad and making the motor run lean?

thanks

both times the ecu died in my sidekick, it just quit running altogether

The usual failure is a capacitor going bad and leaking, the electrolyte that leaks out corrodes the PCB and causes failures. The caps do die of old age eventually but the cause is usually a bad power or ground connection or a faulty battery or regulator. The 8Vs suffer the most because of the much higher switching currents of the low impedance injector.
I'm not that familiar with the Hondas and Mazdas but I think they share a similar design to the 16V Suzukis - they use a MAF based system with a clone of an Hitachi H8 processor.

thanks for the info

i have a 91 B2600i that had an ecu failure
i would get no CEL/MIL codes and the truck would die if you touched the throttle until it warmed up

one of the capacitor seals had shrunk and leaked all over the board resulting in corrossion and breaks in connections

we have a 94 tracker that had low compression so we swapped in an 8v block, compression bumped to 150-ish across the board but has since dropped to 90psi across the board, in less than 10k miles
the 8 valve block was out of our field tracker so i assumed the beating on the motor took a toll, but just came across some information about tracker ECU's going bad so I thought there might be some connection...

I did a quick google came up with this pic of a B2600 ECU.



Its a DSM ECU, looks very similar externally to a Suzuki one (also made by DSM), even has the same connector as the 16V ECU I have here. Have you got any photos of the circuit board?

How much is a new ECU? or can you just rebuild one?

New - many $$$$$. They can be rebuilt up to a point, there are quite a few custom components in there that can't be sourced. The caps can be replaced and corroded tracks hardwired. There are quite a few places now that will repair one and return it it fully tested and waranted (sp). If you have the skills and equipment then you can replace the caps but its important to use the right caps, they're usually Rubycon or Nichicon high reliability caps and the datasheets are available on the web.

Here take a look at this.

http://www.tmo.com/howto/ecu1g/caps.htm