Inconsistent Starting; Fuel Or Starter?

[sahtt]

I know a lot of you guys have had your starters replaced. If these problems/symptoms relate or differ from yours, please speak up.

Situation: The car usually starts up within 1.5-2 seconds of cranking. It turns over and runs like a watch. Just had the timing belt, WP, all seals, etc. replaced [by yours truly ].

One out of 10 starts, so far only whenever the car is not completely cold or has been driven in the last 2 or 3 hours, will either crank for 8-10 seconds [slowly increasing in speed towards actually starting] and then start, or just keep cranking until I stop trying. Today it didn't start after cranking it for 10 seconds 3 times. Right before I called the two truck I tried one last time for sh**ts and giggles and it started immediately.

The car is a 91 LS with 133k, battery cables are ok, cold fuel injector replaced a couple years back, no other issues.

Before I rip open my only car, could this be a fuel/fuel pressure regulator issue? I cannot find information on it nor where it is even located. I am mechanically inclined, but only have basic tools, such as the ones need for the TB/WP job, no torch or anything powered. I guess I'd have to go by the factory service manual, there goes another 100 bucks.

If I were to replace the starter/starter contacts and still have this issue, I would probably get very, very, very angry

Thanks for any help and or suggestions, this is a major decision for me

[rlin78]

Have you tried cleaning the iacv?

[sahtt]

Have you tried cleaning the iacv?

No, I'll search and try to locate it. Otherwise, some general details regarding its location would be appreciated.