I am having an issue with a 97 Ford Ranger. When sitting at idle it runs fine, when you take it out for a drive and give it gas it misses, I pulled a random cylinder missfire out of it but with the solus i can not tell which cylinder is missfiring. The customer stated that in the morning when he starts it it runs like **** until it warms up a little. I ran a pressure tester on the cooling system and it dropped 4 pounds in about an hour. The other thing I noticed was that it seems like it does not have enough fuel pressure, reading about 35 lbs when running. I replaced the fuel filter and it did not make any difference. I have the feeling that it might have a blown head gasket but I was looking for some advice if anyone had run into this problem. The engine is a 4.0L if that helps.
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