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gorilla 08-19-2012 13:49:43 72.190.106.8 Report to Moderator	I posted the other day and got some good advice about the injector pump on my JD 4230. It would not start when it was hot and had reached a point where it wouldnt start "cold" unless i poured ice water on the injector pump. The injector pump was in bad shape.. I had it rebuilt and they replaced the head/ rollers etc (stanadyne DM model). I got it back on the tractor and it started right up.. Starts great from a cold start, runs better and seems to have more power now, but it still will not start after it has been running for a few minutes. If I let it cool down for a half hour and pour cool water on the pump it will start right up. I dont think it is low compression because it runs strong and only starts after the pump is cooled down. The starter turns the engine over plenty fast to start. What would cause this? Thanks for the help the last time and any advice you have this time. [Reply]   [No Email]
teddy52food 08-19-2012 19:48:20 184.94.175.179 Report to Moderator	Re: 4230 injector pump/ hot start in reply to gorilla, 08-19-2012 13:49:43   I would quit pouring cold water on it. It may seize it up as the clearances are pretty close. [Reply]  [No Email]
David G 08-19-2012 18:53:18 205.215.206.18 Report to Moderator	Re: 4230 injector pump/ hot start in reply to gorilla, 08-19-2012 13:49:43   Are you sure they replaced the head, sounds like that issue. [Reply]  [No Email]
gorilla 08-19-2012 19:15:58 72.190.106.8 Report to Moderator	Re: 4230 injector pump/ hot start in reply to David G, 08-19-2012 18:53:18   Yep, They replaced it. They saved the old parts to show me. I'll check the fuel line to see if its getting hot. Can a diesel vapor lock? [Reply]  [No Email]
Bob Harvey 08-19-2012 14:50:18 209.91.107.159 Report to Moderator	Re: 4230 injector pump/ hot start in reply to gorilla, 08-19-2012 13:49:43   Just a WAG, how is the fuel line from the tank to the pump (or whatever plumbing there is). Near the exhaust or too close to the block ?? HTH [Reply]  [No Email]
gorilla 08-20-2012 08:08:33 173.57.13.234 Report to Moderator	Re: 4230 injector pump/ hot start in reply to Bob Harvey, 08-19-2012 14:50:18   I was told that a weak transfer/lift pump might cause this problem because it is causing the injector pump to work harder. Has anybody had any experience with this? [Reply]  [No Email]
Bob Harvey 08-20-2012 15:19:15 209.91.107.159 Report to Moderator	Re: 4230 injector pump/ hot start in reply to gorilla, 08-20-2012 08:08:33   No experience at all, just thought I might be able to help with my comment. Best of luck with your problem. [Reply]  [No Email]