Hi guys,

In my astro van have a very peculiar problem, the when i start the engine the rpm get high (like 1500-2000), i replaced recently: Fuel filter, spark plugs, spark plugs wire, tps, iac, maf sensor, i check error code i get P0134 and P1886, i check the o2 sensor and the wire and i also take this to dealer and he reprogramming the PCM when he do this and when i disconnect the minos cable from the battery and connect again this Resolved the problem but after few days it's back again.

Have idea?

 

*Moved to 'The Lounge'. Not a Blazer thread, even though the engine may be the same.*

 

You could have three different and distinct issues going on:

1. Do you notice if the high idle seems to settle back down at a certain engine temp every time? How long does the high idle last? Could be a vacuum leak that is sealing as the engine heats up and expands sealing the leak.

2. Code P0134 could be an issue with the circuit integrity such as a wiring problem or even a PCM problem.

3. Here is a link to a good thread on this forum concerning P1886 that you might want to check out: https://blazerforum.com/forum/engine...olenoid-23807/

 

[QUOTE=rockp2;673976]You could have three different and distinct issues going on:

1. Do you notice if the high idle seems to settle back down at a certain engine temp every time? No
How long does the high idle last? All the time

I don't think this is a vacuum leak that when I disconnect the minus and returns it goes and comes back after a few days