Slight problem after cam, headers

[AndyLT1]

I did some motor work a couple weeks ago. Xe 224/230 cam, SLP shorty headers, Random Tech converter, and an opti. conversion. When I first start it up it runs smooth. After about five minutes it has a kind of stumble. I'm assuming it's engine temp. that does it. It will do it in any gear. It kind of surges while keeping a constant speed at any RPM. Again, when it's cold it runs perfectly smooth. I have no engine lights and it feels real strong, but it just isn't perfect. Any ideas? Sensors?

Thanks,

Andy

[Injuneer]

Who did the programming for the cam? Cam surge at idle and low loads can be a programming problem.

If it goes downhill as it warms up, it can often be a problem with the O2 sensor feedback loop. Doesn't mean the O2 sensors are bad, only that something is causing them to give the computer bad numbers. Problems can include:

-faulty O2 sensor install, poor grounding, bad crimps in harness extenstions.

-misfires due to wire burned by or arcing on the headers

-exhaust leaks before the O2 sensors

-high voltage (plug) wires running too close to O2 sensor wires.

-contamination of O2 sensors.

The best thing you can do is get a scanner on it, and examine the long term fuel corrections (BLM's) for a wide range of Cells (operating conditions).

[Joe 1320]

Hopefully, the MAF hasn't been altered or that might contribute to the problem. Ditto for any leaks in the intake or vacuum lines after the MAF.

[wolfdogs]

check all the connections to your injectors....that happend to my wifes hawk and it that turned out what it was..two were loose..only got back when it warmed up

[AndyLT1]

Thanks guys. I'll check all that stuff on Sunday and let you know what it was. Oh yeah, PCMForless did the programming.

Andy