Won't rev past 4k?? - Toyota Nation Forum : Toyota Car and Truck Forums

Etown_MR2 · 02-27-2007, 02:08 PM

Hello all. I'm new here and I already have questions

I have a 1991 MR2, 2.2L non-turbo, 5-speed. The engine won't rev past 4000RPM. It seems as though it is hitting the rev limiter. I have had the computer, the fuel pressure, and the timing checked... no luck. Help please?

tHa kNiGHt FaLL · 02-28-2007, 04:49 PM

map sensor

its the only load sensing device (for the most part) on that motor.

and wha do you mean you had the computer, timing, and fuel pressure checked...? by who?

Etown_MR2 · 02-28-2007, 06:44 PM

I am posting this for a friend with the car. Well, not posting, but checking the thread. He doesn't have the internet. I'll have to ask him.
I know he had a mechanic chech the pressure from the pump and I think he ran a hand scanner on the computer. I don't know anything beyond that.
Let me get in touch with him and I'll have him reply. I'll tell him about the MAP sensor. Thanks!

tHa kNiGHt FaLL · 02-28-2007, 08:10 PM

i mean from a mechanic's point of view there is like two things that can effect acceleration consistently and both are plain as day and very easy to check. that why i asked cause i figured a mechanic would have checked those first.

TPS
MAP (AFM)

fuel pressure could be another variable, but i'd check the control that calculates it first cause you'd have an idle issue w/i bad fuel pressure

Etown_MR2 · 02-28-2007, 08:15 PM

I asked him if he checked the pressure under throttle and at idle, and he said that the mechanic said that he did....so, I don't know. He had different mechanics do the different things. I prefer to have the same guy do all the work on my car (what I don't do on my own, which is 85% of it). I'll have him check the MAP and see what turns up.

jesse0880 · 03-03-2007, 12:17 PM

yea man... iv been having the same problem with my deuce. when i give it WOT, at 4k it feels like hitting a wall but the engine wont shut off or anything. when i did a check down of everything ( replace plugs and wires, replace a leaking pcv line). I thought it helped cause when i drive the car up the 4k it felt stronger and more smothe but i still have that problem. but then then i tested my MAF sensor and i found that what i believe to be bad. im gonna replace and see what happes.