A little help...

[ITA240SX]

Hey gang - the following was posted on one of the racing forums I frequent. Since it relates to the KA24E engine, I thought I might find someone here who has run into this, and might be able to shed some light on the problem:

***I have run my 89 240 in ITA for 2 seasons with very few problems that I call "serious".During my winter teardown, I noticed that #1 piston was actually starting to burn. I rebuilt the engine, checked everything that I could think of and started this season off.At VIR in May I burned #1 completely through. I was having some fuel pressure problems so I changed the pump and had my injectors cleaned and blueprinted to be safe. After installing a spare engine, I went to another race last weekend and now have the same problem. The spark plugs show that the engine in NOT lean and I watched the fuel pressure very carefully - that was not the problem. Does anyone know of a distributor or ecu timing problem that exists here. ANY HELP AND INPUT WOULD BE APPRECIATED.***

Any thoughts? It may help to know that in IT the only engine mods allowed are open air filter, headers, balance & blueprint, bore .040 over, minor compression bump (9.5:1 max), and modified ECU (most guys are using JWT). Other than that the engines are stock.

ThanksEarl

[Exar-Kun]

get a wideband O2 sensor and make sure its not running lean, check the heat range for the plugs, and make sure the fuel pressure, etc to that cylinder is alright. (even if the plug looks good, it may be rich just enough to cause problems in racing conditions)

uh..other than that, did you notice any other signs of heat problems in the cylnider? are there any possible heat riser areas in the cylnider(valve, etc?) also, if you're allowed to, take the vhicle to a place that can dyno-adjust the timing and such of the engine and watch the wide-band o2 sensor at the same time, more power, safer -chet

[ITA240SX]

Thanks Chet - I'll pass along your suggestions. I really don't know any more about his problem than what is posted above, but I thought it would be nice to know if there is a problem I should be watching for. Some of the guys over on the IT.com board are suggesting it might be either timing or fuel related.

Earl