OK. I've got a 93 SDV with the 4.9L. Drove the car two days ago in the AM and parked about noon. Went to get in yesterday morning and it turns over, but no fire. Changed the battery for the hell of it and still the same. Checked fuel pressure at the service valve and it's getting fuel. Distributor is getting spark, but it looks weak to me. I'm a 5.0 Mustang guy, so this whole GM setup is a little new to me. Any help?