Hey,

My names Dan. I just brought home my first Toyota tonight. 1988 Single Cab 4x4 22RE 5 Speed. I'm used to wrenching on carbed Chevy's and Harleys. This is my first EFI of any kind and I'm completely lost. My first purchase will be a Toyota service manual but until then I was hoping some of you seasoned veterans of the toyota can help a newbie out.
Here's the problem:

When I press the gas pedal, the RPMS start to climb but but with a slight delay (I dunno if that is common with EFI, I'm used to instant throttle response with a carbed engine). Even after I let off the pedal, the RPMs keep increasing for a second then gradually come down.

At first I thought the clutch might be slipping because whenever I would push the clutch in to shift, the RPMs would keep rising. I am pretty sure the clutch is not the issue and believe it is related to the throttle. It doesn't do this when I open the throttle @ the throttle body. Only when I depress the gas pedal.

Anybody had a similar situation?

Thanks,
Dan

 

www.ncttora.com/fsm

Welcome to Yotatech.

 

Thanks for the link. I just downloaded the manual I need. Now time to get reading...

Dan

 

I have a 22R 84 ext cab and a 22RE 85 ext cab and they drive and respond different, carb to EFI. Not bad, just different.

 

Yea I'd imagine there is subtle differences between the two. Mine doesn't seem "right" though. The RPMS creep up about 5-600 RPM after I let off the gas. So when I'm shifting through the gears, the engine starts reving up whenever I push in the clutch and let off the gas. I'm pretty sure it's not clutch related, because it does the same thing when it's stopped and in neutral. If I barely push the pedal (enough to get the rpms to rise and then let off) it keeps reving for about 1-2 seconds.


Dan

 

check your vac hoses the pcv valve like to stick and it could be that efi need vac to work

 

vacuum leak or a sticky throttle plate

 

Clean the throttle body and check the TPS to see if its good and to see if its adjusted properly.

 

^^ all good suggestions.

I've owned almost that same truck for 14 years now.

It's defiantly not right.

I was recently having issues like that and I changed the plug wires, plugs, rotor and cap and that solved it for me. If you can test wires with a multimeter easily. Probably not your problem though.

The above suggestions is where I would start.

 

this sounds pretty easy, clean and lube your throttle cable.

 

Might just have a lot of carbon build up. Carbon soaks up the fuel, takes a second to saturate, then you let off & the over saturated carbon releases the stored fuel which also takes a second.

I x3 myota; clean the throttle body and check the TPS & also x2 yotaman85, check the throttle cable. Cleaning stuff is easy & won't hurt anything even if that's not the problem; always start with the easy stuff

 

If it's not throwing a code, it's prolly just in the preventative maintenance...


Fuel filter... Timing chain...

Do the easy stuff 1st... Like a tuneup. Then check the compression and remove the valve cover and check the plastic timing chain guides.

And DO NOT put them back in, should you change them out. You can EASILY put STEEL 20R guides back in there.

Just remove about @ a 1/2" off, and chainsaw file a portion of a bolt hole into the existing guide.

 

also, pick up a can of seafoam and run it in the gas tank, i like to use a whole can with a full tank. then run through the vacuum lines, i like to use the brake booster line, it seems to get the most even flow to all the cylinders. just take your time and do not use too much at once.. seafoam has fixed ALLOT of rough running problems ive seen.

 

It was a sticky throttle cable. Lubed it and it works fine now. I'm looking to find a replacement though..


...Dan

 

Yea its quite dangerous to have a defective throttle cable however i've yet to see one totally freeze up or fail in a toyota.