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The 580 is an LH 2.4 ECU Posted by RS [Email] ![]() ![]() ![]() In Reply to: Re: If the ECU is from a '90 ..., LarsW900T, Sun, 28 Aug 2005 15:23:17 Members do not see ads below this line. - Help Keep This Site Online - Signup |
A couple of things:
Put the screens back in the AMM. They even the airflow profile across the bore of the AMM so the single point at which it measures has a better chance of being representative of actual amount of air going through it. (I'm an instrumentation and controls engineer, and air flow measurement is something that I work with on a regular basis.)
When you replaced the ECU, did you replace the fuel pump relay and the system relays? You'll want to replace them on general principles because they have a snubber that absorbs the backpulse that occurs when the relay is turned off. As the relays get older the snubber deteriorates and lets the backpulse go back to the ECU. That is probably what knocked out the fuel pump output in your old ECU. Changing the relayes will increase the longevity any ECU that you put in there.
Good question on what's causing the upshift light to pulse like that in first. My first thought is that this ECU isn't good either or that you have a bad ground on the front lifting eye.
It's possible that the O2 sensor is getting slow and it responds better to slow throttle changes than quick ones.
The rotten egg smell often indicates a slightly rich mixture. A few years ago, somebody posted a link to a paper on the conditions for producing H2S in the converter. It's been long enough that I can't remember who posted it.
The link below is a reference for LH ECUs.
http://homepage.mac.com/ljwest/test/LHparts.html
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