Long Crank, Hard Start

Hello to all
I have 2TR-FE engine
When I want to start the engine in the morning it works and start normally
But after 30 min its take a long time (long crank) I usually take two to three times then start

i changed fuel injectors, fuel pump and crankshaft position sensor
I check the fuel pressure regulator by gauge about 41 PSI

 

Pop the #4 coil out (it’s easiest to get to). Is the coil (at the plug) dry or wet and covered in oil? If it’s wet you need new valve cover and spark plug tube seal gaskets. Welcome to TW!

 

I forgot to say I changed a new plugs (laser)
And 4 new coils

 

Check a coil, again to see if they are wet

 

Take it to a shop and have compression (both static and dynamic) and have a cylinder leakage test performed on it. Those 2TRs are indeed notorious for having either bad valves or a blown head gasket.

 

So, essentially it’s hard to start once the truck has warmed up?
But starts normally when it’s cold?

 

I believe that's what OP is saying. I had this issue on my old truck. But it sounds like OP already eliminated what I was going to suggest.

Are there any codes?

 

No code issue

 

News to me. Got any backup links on that info?

 

No links. Hard evidence at the shop I worked at over the course of many many years.

We didn't have a major slough of them coming through but when they did and they involved anything related to misfires, hard starts, or intermittent misfires at start which would then smooth over the longer the truck would run. It was always either valve or head gasket issues.

This assumed that the customer or prior shops replaced all secondary ignition components including coils, and even went as far as replacing injectors and/ or fuel pumps.

 

Sounds like a hot soak issue; my first tests would be starter and coils.

 

OP says it cranks and has replaced all for coils.

OP, how long after you turn it off is it that it is hard to start?
As in, what is the amount of time in between turning off the engine, and then restarting the engine?

 

D'ohhh... missed that.

In that case, a good scan tool with live data; look at the outputs of all the key sensors (MAF, TPS, Cam, would be a start) and compare their data to what you should be getting, both when running normally and during the hard/no start condition.

 

Check coolant temp sensor. Preferably with a code/data reader

That's the first thing the computer looks at on startup

 

Any resolution to this? Mine suffers same problem, once warm, randomly takes a long crank to get it started, and the start is slow/low RPM like low fuel pressure. Even only being shut off for 1-2 min. No oil in my spark plug tubes either, last owner replaced #4 coil. I will check the coolant temp sensor reading.