05 4.7 V8 has intermittent extended crank time on cold/hot starts.

[paraplan]

i would also add that you have to check them fast because sometimes after a few minutes you may not see them dripping as fuel pressure has reduced.

i had a friend with a tacoma chased this for almost a full year after an engine rebuild where she had her injectors cleaned and reconditioned. turned out she had 3 of them leaking but was only having the problem on warm starts. they leaked only under full pressure immediately after shut down and stopped dripping after just a minute or two. she went through 5 different auto shops and finally a neighbor who had a bore scope, found and fixed the problem that nobody else could find because they only tested the injectors on the bench and not in the truck with a bore scope so the pressure in the truck was somehow more then they used bench testing them.

Very similar situation - my engine was also rebuild and injectors cleaned.
How do you find a leaky injector with a bore scope??
Attaching injector cleaning report.

 

[keakar]

Very similar situation - my engine was also rebuild and injectors cleaned.
How do you find a leaky injector with a bore scope??
Attaching injector cleaning report.

you run the engine to get full fuel pressure and cycle the injectors, then shut off engine pull one plug and use bore scope inside cylinder to see if the injector is dripping fuel.

you only have like a minute or two at full pressure so you need to work fast and rerun engine for a second between each cylinder test.

do this for each cylinder to see which ones are bad.

that person had all the injectors professionally cleaned, rebuilt, and pressure tested from an injector specialist (not just a garage) and they all passed inspection, but there were 2 that were still dripping fuel and after buying 2 new injectors there were no more problems