Low Idle

[Kyle McL]

So I was originally had idle surges. I fixed it by cleaning the carbon from the throttle body. However, it stalls out when I first start it. The only way to prevent it from stalling out is by giving it some gas for a little bit. It normally starts up fine after driving it for a little bit. Any ideas of what to check or do? The idle also changes between 850 where it feels like wants to stall out but sometimes climbs to 1200. When I am sometimes sitting at a light, it bounces between 1000 and 1200 rpms.

 

[92AWDHX40]

http://www.dsm.org/how-tos/tttt/tttt3.html


this is a good start

 

[Kyle McL]

I forgot to mention. The previous owner put a turbo on. The new down pipe does not have a O2 sensor hooked up to it. So I really don't think that would make a major difference. It does run a little rich but I don't mind it so much.

 

[nathan_spindler55]

your o2 sensor should be in the housing right off the turbo. if you dont have an o2 sensor telling your ecu what to do then your car will not run right at all.

 

[92AWDHX40]

Start reading that thread and go down the list.

 

[yoder]

on idle surges check your TPS, IAS, CAS, and also wrong size injectors will do it to if your running the 390 cc injectors with a turbo u at least need the 450 cc for it i had the same problem and took me forever to figure it out

 

[Kyle McL]

The motor was rebuilt by the previous owner. I believed he upgraded the injectors but not certain. I will have to check that. I still want to get a new downpipe with a input for the O2 sensor.