SOLVED! Post 2853 Leaking Injectors, Dealer Techs Rock! Extended Cranking after Engine Swap 3.4L 5vz

Looks like there are game fences now. Many years ago I hit/killed a Black Panther there, the endangered animal one not the other kind. Back then there were 29 known to exist.

 

DP, as far as running the part #'s online, it's possible the FPR info I gave isn't accurate - my usual parts guy is off today. The guy I spoke with has given me wrong info before (about circuit opening relay).

EDIT: OF COURSE it's good for your brains! How dare you insinuate otherwise?!?!?!?

By the way, random coincidence. Neighbor's friend has a 92 4 Runner that he just rebuilt the engine in (V6). Really purty black one. When he was leaving the neighbor's house the other day, he had excessive cranking! I tried to talk to him about it, but he was thinking his problem was being low on fuel. Pretty sure he backed out in neutral, then got pointed facing downhill, and was able to start it that way. Same guy's over there now, and I'm headed out front to pull weeds and touch up some exterior paint before our appraisal this week. Wonder if he'll have excessive cranking again when he leaves.......

 

Different model V-6's all together. The 88-94 V6 is a 3.slOOOw and the 95-2004 v6 is a 3.vrOOOOOM!

 

Am in the keys. Nice and hot. I like it!

 

Key deer. Big Pine Key. They only place in the world they live. My dad feeding them.

 

Sunset, north side of Big Pine Key.

 

Had the pressure washer going when neighbor's buddy left, so not sure if he had excessive cranking or not. Darnit! Wanted to find out more about his problem.....

That PDF is from FSM, on installation of FPR. Wonder if a step was goofed up when it was installed way back in early Jan? Sounds like there are steps that have potential to get goofed up, right?

 

I got the p/n off the fuel pressure regulator and confirmed by vin that it is the correct one for the car, so everything is good there.

I attempted to disconnect the iat sensor by removing the iat sensing wire from the maf connector. I did this test because of the 4 cyl tacomas that claim this makes their extended crank go away. After a test drive and hot soak there was no affect on the extended crank, kept on keeping on. the iat reading according to the scangauge when disconnected was -40deg. I think that the ecm uses some kind of modified coolant temp to figure iat at that point?

Next test was to spray throttle body cleaner (fuel) into a vacuum hose connected to the intake manifold after the hot soak and before start-up to confirm the problem is not a lean condition. The crank was longer and the start was worse when trying this so I would like to believe we are not looking for a lean condition since adding fuel did not improve the start but made it worse

Dirty Pool: applying vacuum to the fuel pressure regulator decreased fuel pressure but I wasn't paying attention to the specific vacuum or psi readings. this was done a few days ago on a whim and I cant remember the specifics

So some people keep bringing up "where is the pressure going" which I decided was a pretty valid thing to find out so:


Pressure Test A involves starting out with a running vehicle. Shutting off the vehicle and then switching the "manual shut off valve" to keep pressure only between the fuel tank (read fuel pump) and fuel pressure gauge to observe pressure bleed down.

Pressure Test B involves starting out with a running vehicle. Shutting off the vehicle and then switching the "manual shut off valve" and installing pinch off pliers in order to observe fuel pressure bleed down through the injectors.

These are hypothetical tests (not found in the service manual ) and I don't know if they will work but these are my thinkin thoughts

 

Can`t hurt to try!! Thinking outside the box is always good

 

so an afternoon drive to the summit of the steens would lower my pressure a bit?

 

I believe a shot of bug wash is in order here...

 

I think they redesigned the forum just so Jen cant keep changing the name of her thread lol, that option is no longer there

 

I don't understand the bottom diagram in the pdf that shows the correct and a wrong way? what's the difference??

 

Oh yes it is! And has been updated to include your current concerns Wait, is it considered a thread jack if the OP jacks the thread's title?

 

I have always noticed a broken fastener to what looks like a plastic conduit that carries wires to (what looks like) the injectors. could this possibly cause any sort of injector pulse issues?

 

I like them thinkin thoughts noahpete. I say go for it Then if things don't turn out the way you hope/intend, then we can all blame Wyoming, since he said to do it You don't mind, right Wyoming?

I am seriously impressed that you managed to remove the IAT wire inside the MAF??!??!?!?!? REALLY!??!? Wow. That must have taken some serious patience and incredible hand/eye coordination, those wires are microscopically tiny and way the heck down inside there!! That's interesting that the IAT went down to neg 40, yet crank time still kept on keeping on. What do you guys think - is something like that movie Christine going on with the Taco???

https://www.youtube.com/watch?v=v5N3fKVz-Z4

Thank you for working hard on it, hope today yields more clues and the Taco cooperates for you!!

 

Yep, several of us have mentioned nailing down the pressure and the bleed down issue before going any further. I'll mention it again, see post #2639 describing the "hypothetical test", a week ago. That may come off as pissy, but it's not.

 

OK, I SEE IT NOW, ITS IN THE THREAD OPTIONS ON THE RIGHT

 

you silly

now change it to say "Jen's mechanic in training" thread

actually I wish you would go back to the "crazy electrode lady" title lol.

 

You don't want to pinch that o-ring as you slide it in place Eric. If it is pinched,,eight times out of 10 it has cut or severely weakend the side of that ring and it needs a new one. It will cause a leak. Delicate work there,,it absolutely needs to be perfect. Something to eyeball as well, cause that could cause a drop in pressure due to bleed off. It would/could be spewing fuel and also dirty'd up from grit attaching itself to the fuel arond that area. One for the list also. Good job at making us look at that little sucker a little closer. Hypothetically, a chunk of that ring could get sheared off and sent on its way down the fuel line to cause havok downstream.