Saying farewell to the Toyota FJ Cruiser

bobpbx

Piney
Staff member
Oct 25, 2002
12,283
2,525
Pines; Bamber area
Just a guess, but air density changes with temperature, which alters the oxygen content in a given volume. It's why old naturally aspirated engines performed better on cool days. Could be the O2 sensor is bad and the mixture settings needed for the warmer, less oxygen rich air are getting messed up. This would show up right away in a diagnostic, btw.

Thanks, I'll have it checked.
 

Broke Jeep Joe

Explorer
Mar 8, 2006
655
343
Waterford Twp
I am guessing no check engine light on, right Bob? If the light is on you have a hard fault code that will lead you down the path to the repair. If there is no 'CEL" illuminated my first guess would be fuel pressure bleed off, meaning the system has a pressure regulator either in the injector rail or in the fuel pump in the tank (sometimes both) that maintains a certain pressue for startup, if the diapragagm goes bad it will allow the heat of the engine to vaporize the fuel or depressurization from bleedback meaning fuel draining back from the injectors casuing a hard start when hot. If the regulator is in the tank, it has a valve that maintains fuel line pressue for starting, if it goes bad it will allow the fuel to bleed back to the tank and the pump will need to re pressurize the lines before it will start correctly. This is generally speaking for most fuel injected vehicles, not sure what type your yota is. I know the older 22RE rngines have the regulator in the rail. The next time you park it for the length of time you mentioned that causes the no start, cycle the key on and off a few times before attempting to start it, if it starts normally it is a fuel pressure issue. If your no start still remains, let me know either here or PM, I do this stuff for a living.
 

MarkBNJ

Piney
Jun 17, 2007
1,875
70
Long Valley, NJ
www.markbetz.net
I am guessing no check engine light on, right Bob? If the light is on you have a hard fault code that will lead you down the path to the repair. If there is no 'CEL" illuminated my first guess would be fuel pressure bleed off, meaning the system has a pressure regulator either in the injector rail or in the fuel pump in the tank (sometimes both) that maintains a certain pressue for startup, if the diapragagm goes bad it will allow the heat of the engine to vaporize the fuel or depressurization from bleedback meaning fuel draining back from the injectors casuing a hard start when hot. If the regulator is in the tank, it has a valve that maintains fuel line pressue for starting, if it goes bad it will allow the fuel to bleed back to the tank and the pump will need to re pressurize the lines before it will start correctly. This is generally speaking for most fuel injected vehicles, not sure what type your yota is. I know the older 22RE rngines have the regulator in the rail. The next time you park it for the length of time you mentioned that causes the no start, cycle the key on and off a few times before attempting to start it, if it starts normally it is a fuel pressure issue. If your no start still remains, let me know either here or PM, I do this stuff for a living.

Damn good point about the check engine light. Bad sensor should trip that on.
 

WaretownMike

Explorer
Jul 16, 2013
188
92
49
Waretown
I used to slag on trucks with independent suspension until I got my old Ridgeline. I had always been a die-hard Jeep fan. They're great off road, but lousy on-road. Then I realized that, for the most part, nothing in the Pine Barrens requires a vehicle have that much flex. (Maybe if you're going into a super deep mud hole, but if you are then you deserve to get stuck.)

I think Toyota realized that while the truck is great for being off-road the vast majority of them wouldn't go, and likely a sizable demographic would be people like myself who just want to tool around the woods and not climb up mountains of butter.
Having had both, the FJ on-road is just so far more comfortable than the Jeep. I just traded my FJ for a great deal on a Wrangler Unlimited that I couldn't pass up. Rough on the tush though
10678574_10152771130964802_1160923739299775895_n.jpg
 

bobpbx

Piney
Staff member
Oct 25, 2002
12,283
2,525
Pines; Bamber area
By thet way, great looking truck, excellent replacement choice!

Thanks Joe, and thanks for that tip. I did not have a check engine light for this problem, you are correct. I got one when I disconnected some of the electrical connections to clean them, but the light went out by itself after 50 miles or so.

I will try what you suggest next summer. You want me to energize the fuel pump by cycling the key to the "on" position several times, but not all the way to start. It makes sense. And, since it always eventually starts when I do crank it over, maybe it's just waiting for the fuel to come back up.
 

Broke Jeep Joe

Explorer
Mar 8, 2006
655
343
Waterford Twp
That is exactly right Bob, by cycling the key you are effectively re-pressuizing and refilling the fuel lines. The condition may become evident in the cooler weather also IF the regulator gets worse as time goes by. An easy way for a shop to check is to put a fuel pressure gauge on it, start it and check the pressure reading for accuracy, then shut it down and monitor the drop in pressure via the gauge. Some pressure drop is normal as the fuel tank pressure vents, etc. but what you describle should sho a significant drop or a "zero" within a certain amount of time.
 
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ecampbell

Piney
Jan 2, 2003
2,578
618
I have a similar problem with my TJ. After sitting for awhile it will crank and crank until it finally starts, maybe 10 seconds but it makes me nervous when I'm alone out by Jemima Mount. I discovered that by turning the ignition to ON and waiting for 15 sec it fires right up.
 

Teegate

Administrator
Site Administrator
Sep 17, 2002
23,329
5,209
My brother has the same problem with his Jeep. I will have to tell him Ed's fix.
 
Jul 12, 2006
1,121
160
Gloucester City, NJ
Oh the overall utility of the design is absurd. The stupid suicide doors, the low windshield (with three wipers!), the cave-like rear compartment, lack of any storage whatsoever, the laughably useless stock roof rack, the even more laughably useless stock aluminum skidplate that you can bend with your hands... I could go on. But it all sits on top of an awesome platform and it will climb trees :). I don't necessarily agree about the sfa by the way. I think it was a good design choice. The independent front suspensions handles and corners much better than any wrangler will ever aspire to, and there's really no terrain other than rock hopping on which the sfa has a serious advantage. If you need that much suspension travel, then yeah sfa is the way to go.

Btw, just got her back with the new 32" Goodrich Rugged Terrains (I think I said 33" before, mistake). Nice ride. I'm impressed.


Do you know how the Rugged Terrains compare to the Rugged Trails? I have the latter on my 2007 Tacoma, but will need new tires before winter probably.
 
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