Topic: Where to start?

[franky112665]

Here's the scoop. My dd is a 94 yota extended cab 4x4. I'm running maxxis buckshot 31x10.50x15 tires. I'm getting 18.6 to 20.1 on gas mileage. Here's my problem when I'm at idle or just riding at the deer lease at low speeds I'm cutting out and having a hard time idling. My engine is a 22 re motor. It's a rebuilt engine out of a 95 truck. Same injection system off my 94 motor. Question i have is please post a list of things to check or look at. Haven't done a tune up yet. Runs great, good power, just burns to much gas at slow speeds. Thanks again

[Snowtoy]

Sounds like an air leak, likely in the intake system, or possibly cracked/disconnected vacuum lines.  I would start with checking for leaks along the intake system and vacuum lines.  There are several ways to check, first do a visual inspection of the accordion hose and vacuum lines for cracks.  If nothing jumps out at you, grab a small hand held propane torch, crack the valve a little(do not ignite the propane) and run it along the intake system and vacuum lines, if the engine idles up, you have found the leak.  If you don't have it, here is a link to a'93 Toyota FSM.

If you haven't changed the gears, or are not compensating for the taller 31's, your mpg is about 10% higher than what the odometer/gallons is currently equaling.

[Shamb]

rab a small hand held propane torch, crack the valve a little(do not ignite the propane) and run it along the intake system and vacuum lines, if the engine idles up, you have found the leak.

This is what my first thought was, had the same problem w/ my 82 a few years ago and it drove me crazy until I did this. Found a leak on the base plate @ the carb.

[raidernation]

Vaccum leak?

[kevin_david_k]

check your injector wiring

[83yota]

check your timing (as part of a tune up)

[Mega Baby Huey]

Sounds like an air leak, likely in the intake system, or possibly cracked/disconnected vacuum lines.  I would start with checking for leaks along the intake system and vacuum lines.  There are several ways to check, first do a visual inspection of the accordion hose and vacuum lines for cracks.  If nothing jumps out at you, grab a small hand held propane torch, crack the valve a little(do not ignite the propane) and run it along the intake system and vacuum lines, if the engine idles up, you have found the leak.  If you don't have it, here is a link to a'93 Toyota FSM.

If you haven't changed the gears, or are not compensating for the taller 31's, your mpg is about 10% higher than what the odometer/gallons is currently equaling.

x2! did the same thing but with carb cleaner or starter fluid... but propane is definatly less messy if you have a clean engine bay...    i didn't think of that...