Could be the computer hasn't relearned. It takes about 20 starts to remember. Also test your fuel pressure regulator and replace the fuel filter. Check fuel pump relay with ohmmeter,relay tester, or multi-tester.
Make sure you are getting spark in all cylinders and that you are getting fuel and power to injectors
Spark, fuel,compression,air flow,and timing Then any vehicle will start!
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An engine needs only a few basic functions in order to run, they are fuel, compression and spark.
Have you verified fuel pressure ( I know it is a new pump, but press must be correct), pull a spark plug wire off and verify ignition spark while cranking engine over, pull a spark plug out and test compression ( if a timing belt has skipped a tooth or has broken the compression will be too low).
If the security system is an "add-on", it could be faulty. If it is factory installed we can investigate that after the basics have been verified.
Good luck, let me know.
Regards,
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sorry I didn't reply, I was out of town on business. This is a 1999 rodeo, it has spark, can I measure fuel pressure with a tire gauge? The spark plugs are deep within the head, when #1 plug is pulled and I put my hand over the head it blows my hand off the head. I would need to purchase a special pressure tester to determine exact cylinder pressure.
I have been out ot town and not had an opporuinity to try your recs, until yesterday, I have spark on 1st cyl. I cant check compression with my tester as plugs are deep within the head, there is evough pressure to blow my hand off the head when cranked,. Can I use tire gauge to test fuel punp pressure?
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