Fix it Sunday... Master Mechanic, ask me anything!

Why are mechanic's vehicles never fixed? Asking for a friend.

Procrastination. The struggle is real.

Currently need a wheel speed sensor and a CV axle in my Volt. I'll get around to it..

why did Honda replace the head on my wife's Fit? it was out of warranty, but they could not get the dash light to go away until they replaced the head and the injectors, a $5,000 job that was done for free. Only thing I can think of is there was a design change for the head, and this would be the only way to fix it. The light was showing an emission problem, and would come and go randomly.

Last Edited by CharlieFoxtrot on 08/14/2022 07:42 AM

Probably for a misfire. Castings can shift over time and although they try to model and predict the er, fit of things sometimes after many heat cycles parts don't line up like they used to.

The Pentastar 3.6 was notorious for this. The valves would either burn or lift off the seat at an angle and the cylinder would only have 90 psi cranking compression instead of 185. Dealerships don't do valve jobs, so the whole head gets replaced.

Okay, I'll give this a shot because so far four different Toyota dealerships have been unable to resolve this issue.

Vehicle: 2008 Toyota Tacoma SR5 4x4, 5-speed manual transmission. 238,000 miles, original engine and transmission. I am a Nazi when it comes to preventative maintenance, so I take care of my vehicles.

Issue: When I hit ~2,500 RPM in 4th gear and engage the clutch, the throttle sticks at 2,500 RPM for approximately five to ten seconds and then very slowly starts to wind down to normal. If I punch the accelerator it unsticks and returns to normal.

Problem: IT ONLY DOES THIS IN 4TH GEAR. If I reach 2,500 RPM in any other gear and engage the clutch it behaves perfectly normally. I can reproduce this at will.

Repairs made so far by various dealerships:
- Disassemble, inspect, and clean throttle assembly - no problems found
- Clutch replacement (An unnecessary repair that I ended up not paying for when I complained - that's a different thread)
- Head gasket replacement (for a different problem, but interestingly enough, it made a difference for about two weeks and then it came back)

At this point I am half tempted to just take it in and tell them to replace the throttle assembly even though they say there's nothing wrong with it. My big question is why does it only do it in 4th gear? How could throttle "know" what gear I'm in?

Good luck, and thanks!

A little metal for the thread..

4 cylinder or 6?

It sounds like rev hang. It's programmed in for emissions, and Toyota's were so bad about it the aftermarket developed boxes to alleviate it.

[link to www.toyotanation.com (secure)]

Had the dealer tried a software update?

What is your opinion on oil additives, specifically hot shots stiction eliminator.

[link to www.hotshotsecret.com (secure)]

are engine swaps are straight forward when done by

professionals? (identical engine)

how many other components are expected to fail

after the swap aircon compressor?steering pump?water pump?


are mechanic paid car services supposed to pick up promblems like

bad gluggy oil? failing spark plugs? ageing water hoses?

etc etc

otherwise besides changing the oil what is the point of them

I have a 4045T JD industrial engine. Trailer mounted with a pto clutch. Ordering a 250 amp 1ph Marathon generator to mount to it.

I'd say it's not a bad idea. Diesel fuel has underwent a lot of chemistry changes and has lost a lot of the lubricity it once had.

Dodge is recalling and replacing every CP4 pump out there and refitting the engines with the old CP3.3 pumps due to the CP4 being unreliable and chewing itself up and trashing the injectors.

You asked , the duramax is basically the starship Enterprise and the first thing to go when I drive it like I mean it is the bushings on the sway bar .

But I’m running a negative caster angle , like a negative 2 or 3 degrees witch isn’t much. Tire wear is perfect but the top of the wheels lean away from the turn as a posed towards the turn . It looks kind of weird and doesn’t steer so good unless in a massive over steer. All other angles seem to get the death wobble.

?

What is the meaning of life?

Currently have a 2015 and 2017 Dodge Ram diesel. I try to fill up as often as possible from a local oil distributor because theirs gets me a bit more buck bang, as they try hard not to buy any diesel with the bio stuff (French fry grease) in it.

4 cylinder. No dealership has mentioned anything about a software update.

Okay, another question now: If this is programmed by design, why did it start doing it all of a sudden 14 years after I purchased it? It hasn't always done this. Could some dealer have performed a software update that caused it in the first place??

I’ve got a diesel RV that’s been sitting for two years.
Do I need to flush the fuel system or do anything else before I try to start it again?

I remember this on this forum from like 10 years ago , either double clutch or just don’t go there , at the least that’s 40 mph , l think it’s for fighting a potential stall .

Oh ya , it has a 1979 first generation Dana 60 (snow fighter) front axle with F-750 front leaf springs for the win .

No

I read online that if I stick a resistor from radio shack in my O2 sensor it can make up to 15 extra HP but when I try it just makes my tach float around. Wat am I doing wrong?

My 2010 f150 has a "dragging" feel when I make 90 degree turn. Goes away when truck warms up. Sewms to be getting worse. Maybe change the rear end fluids?

My motorcycle has a rattle when I’m slowing down in gear. Just sounds like something is loose. You can only hear it between 20-35 mph.


Any ideas?

Chain is loose .

Power steering pump , might just be a fluid issue .

Role playing is useless.

Rainman Ray on YouTube is my go to mech to see how to fix my car. And that New York guy Eric O from South main auto.

My 2007 4 cylinder taco does the exact same thing. Always has. They replaced the frame in 2020 and did all the recalls on it including a throttle software upgrade. It still does the same thing when I shift at higher rpm. Mine doesn't have to go to 2500.