Camry SV21 3S-FE problem

[Zandro]

I have a Camry 2.0 XLi 87mod that i bougth 4 months back for 600$
It was in a bad condition but ive restored it now, i have managed to
fix all but the engine witch has a strange problem, it wont accelerate properly
before 4500rpm!, it jerks if i apply full throttle when cold (like it`s having a fuel shortage)
the jerking goes away when the engine reaches normal temperature, but it still
feels like im driving with the handbrake on (witch im not) but when i do reach
4500rpm it accelerates like a madman, ive changed: Map sensor, ECU box, Igniter Module
Air intake temp sensor but to no use it still acts the same. I`m not sue if you can help me
sine the Euroean version and the US version which most of you have is quite different
when it comes to sensors and engine managment, i know the 3S-FE engine like
the back of my hand, but i still cant figure out whats wrong, not even the original
toyota service manual says anything about this error, and the people at toyota
dont have a clue either, someone who can help me?

My 3S-FE engine (128hp European version /w MAP sensor)

[95WhiteCamry]

arent you supposed to have an oxygen sensor coming out of the exhaust manifold in the front? i see a piece of metal thats blocking the hole for it....it's a bit below the warning plate with the red X. i'm not saying it will fix your acceleration...i'm just wondering why you don't have the sensor there...

[Zandro]

The european version doesn`t have an oxygen sensor. you only
have them because of the emmisons requierments in the US.
My father actualy has the same car that you have but his Developes
136hp (European version) instead of 125hp? (US version) he too (as i) have no oxygen sensor

[toyboyracer]

Zandro, where the pod filter goes on there is supposed to be an Air Flow Metre ?

My Aussie ones got it as well as the American ones...



Not my car, but as you can se the AFM (big silver box) is in line the piping from the throttlebody.

Or on this one

[Zandro]

No there is a MAP sensor instead of the Air Flow Metre that you have
(the map sensor is the little black box with the tube rigth over the trottle house, if you look the picture i posted)

Eurpopean Version
3S-FE /w Map sensor
128Hp @ 5600rpm
133lb/ft @ 4400rpm

US/Aussie Version
3S-FE /w AFM and oxygen sensor
115hp @ 6000RPM
124lb/ft @ 4800rpm

Edit:
Not that i think it matters but we use 95 and 98 octane unleaded fuel in norway

[toyrolla]

Originally Posted by Zandro

I have a Camry 2.0 XLi 87mod that i bougth 4 months back for 600$
It was in a bad condition but ive restored it now, i have managed to
fix all but the engine witch has a strange problem, it wont accelerate properly
before 4500rpm!, it jerks if i apply full throttle when cold (like it`s having a fuel shortage)
the jerking goes away when the engine reaches normal temperature, but it still
feels like im driving with the handbrake on (witch im not) but when i do reach
4500rpm it accelerates like a madman, ive changed: Map sensor, ECU box, Igniter Module
Air intake temp sensor but to no use it still acts the same. I`m not sue if you can help me
sine the Euroean version and the US version which most of you have is quite different
when it comes to sensors and engine managment, i know the 3S-FE engine like
the back of my hand, but i still cant figure out whats wrong, not even the original
toyota service manual says anything about this error, and the people at toyota
dont have a clue either, someone who can help me?

My 3S-FE engine (128hp European version /w MAP sensor)

Sounds like an ISC (Idle Speed Control) valve, which is located under the throttle body.

Check it for amperage. Should be between 16-17 amps.

[foompla]

Originally Posted by toyrolla

Sounds like an ISC (Idle Speed Control) valve, which is located under the throttle body.

Check it for amperage. Should be between 16-17 amps.

when cold?

[Zandro]

When you do mention the ISC valve, when the car is idleing and
i turn on the "rear window heater" (or what you call it) the idle speed
sinks from 750rpm to around 600rpm same thing happes if i
turn on the fogligths or the turn on the heater, but this should
not affect the general engine preformance? and there is nothing under
throttle body so there is probably another mecanism that regulates the idle
speed, but there are water lines connected to the throttle body

[toyrolla]

Originally Posted by foompla

when cold?

Yes...

Originally Posted by Zandro

When you do mention the ISC valve, when the car is idleing and
i turn on the "rear window heater" (or what you call it) the idle speed
sinks from 750rpm to around 600rpm same thing happes if i
turn on the fogligths or the turn on the heater, but this should
not affect the general engine preformance? and there is nothing under
throttle body so there is probably another mecanism that regulates the idle
speed, but there are water lines connected to the throttle body

The ISC valve is bolted under the throttle body as a lower section:



Here's a reference from where I got the image:

http://www.autozone.com/servlet/UiBr...3d8013ebef.jsp

[Zandro]

i guess i have to check that again, but i cant remeber seeing
any thing else that the water lines, but ill check anyways just to be sure
that i havent overlooked anything

[toyboyracer]

I tried posting this reply this morning but ran outa time...

What about the fuel FILTER ?

If clogged @ low revs would be crap but @ higher revs it would allow ennuf fuel to work?

Cheap fix if it is !

[noofa]

^ as above??

[Zandro]

Originally Posted by toyboyracer

I tried posting this reply this morning but ran outa time...

What about the fuel FILTER ?

If clogged @ low revs would be crap but @ higher revs it would allow ennuf fuel to work?

Cheap fix if it is !

Well that was the first ting i changed. But what you say is wrong
it works the other way, if you got a clogged filter the engine
would work porperly in lo mid range due to the low
fuel requierments but when you give full throttle the flow
is so restricted that you get fuel shortage and jerking, it was
by the way the only error mentioned in the original toyota service manual
that was similar to the error im having, all fuel lines the pump ect
has been checked and everything was in order. It`s probably a unusual
error that im having, but what causes it? it works as intended when i
reach 4500rpm so the ECU must be getting some faulty values, and
therefore miscalculates the fuel supply somehow

[Mike Gerber]

I'm assuming you have already checked the basics; plugs, plug wires, distributor cap and distributor rotor. The ignition coil is also a known trouble area for these 3SFE engines. The have a tendancy to develope a hairline crack, shorting itself to ground on any metal part inside the distributor, producing a weak or no-spark condition. Check that with a DVM.

My next step would be to check the engine coolant temp sensor for being in spec. Toyota just refers to it as an ECT. It's under the green connector and can be seen best in the lower left hand corner of the picture Zandro highlighted. You will also need a DVM for this check along with the specs from a manual.

Good luck.

Mike

[ToyotaGuy50]

I've seen this happen when the timing belt was one tooth off.