SPONSORED LINKS

Lack of Acceleration

Tiny
DECAPTAIN2010
  • MEMBER
  • 75 POSTS
Thanks a lot.I discovered something new, if I test the throttle plate manually using wire and plugging it to a battery it opens fully and remains open except I release the wire from the (two pins)swicth but if I bolt it back to the engine and test using the vehicle or key ignition on the throttle plate opens and then close again even when the ignition is still on. Besides even without plugging in the position sensor swicth it still behave the same. Secondly, in your diagram, is the throttle pedal position sensor in the pedal or outside. Some parts are just identified by numbers. Finally at ignition on the check engine light keep on blinking. Thanks
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Friday, January 7th, 2011 AT 3:06 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Fig 8 shows the location of the TPS, which is at the air intake for the intake manifold. The name for the TPS is shown in diagram. Those represented by numbers are not of concern here.

Throttle opening is controlled by the amount of electrical current which is regulated by the PCM. Using direct battery voltage would open it fully but if it is plugged in, it would depend on what the sensors are telling the computer.

The TPS does not control the throttle opening, it only provides information to the PCM.

When you have trouble codes, the CEL would be indicating, that is the reason you need to rectify the problem by performing test as outlined and repair/replace parts or electrical circuit as necessary.
Was this
answer
helpful?
Yes
No
Friday, January 7th, 2011 AT 3:16 PM
Tiny
DECAPTAIN2010
  • MEMBER
  • 75 POSTS
Thanks. Now if I just decide to change the complete Throttle body, in your opinion, to what extent will it clear the codes or will the solve the problem since all is pointing to that. Thanks
Was this
answer
helpful?
Yes
No
Friday, January 7th, 2011 AT 3:44 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
If the wiring and PCM are tested good, then replacing the throttle body should solve all the problems related to it.
Was this
answer
helpful?
Yes
No
Friday, January 7th, 2011 AT 3:57 PM
Tiny
DECAPTAIN2010
  • MEMBER
  • 75 POSTS
Thanks again. Honestly I am releaved but you scared me again with the PCM and wiring thing. So how do I test for the this two. Besides how well do you trust buying of used throttle body from Ebay because I reside in Nigeria. Thanks
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Friday, January 7th, 2011 AT 4:04 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Test have to be carried out to determine which part is at fault so you need to be aware of the possibilities. It would be of no help if you do not test and just swap things, which can be costly and if it is not the cause, that would be wasteful.

Used components are not guaranteed to be good at all times and you have a 50/50 chance of getting a good or bad part. Personally I do not buy parts through the net so I am not able to make any comments.
Was this
answer
helpful?
Yes
No
Friday, January 7th, 2011 AT 4:32 PM
Tiny
DECAPTAIN2010
  • MEMBER
  • 75 POSTS
Thanks a lot. This means if I have resolve to buy a new throttle body, the only test I need now is for the PCM and wiring. Think of this, can just going to wash the engine affect the PCM and wiring bcos there was no any sign prior to that
Was this
answer
helpful?
Yes
No
Friday, January 7th, 2011 AT 4:41 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Washing the engine can cause short circuit of sensors which can damage the PCM. Wirings, especially connectors can oxidise/rustdue to presence of water and over time coductivity is affected.
Was this
answer
helpful?
Yes
No
Saturday, January 8th, 2011 AT 3:16 PM
Tiny
DECAPTAIN2010
  • MEMBER
  • 75 POSTS
Thanks a lot. Please I cant really get what the PCM looks like. Is it the brain box. What is the shape and exact location. And how many of the codes are related to to the throttle body. Because I have checked and there is no wire harness and no vacuum leak. Thanks
Was this
answer
helpful?
Yes
No
Monday, January 10th, 2011 AT 4:58 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
PCM is the the engine computer or brain box as sometimes called. Located at left rear of engine compartment, near brake master cylinder.
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Monday, January 10th, 2011 AT 5:36 PM
Tiny
DECAPTAIN2010
  • MEMBER
  • 75 POSTS
Does it mean even as it is thouroughly sealed water can penetrate inside bcos I checked it and it was sealed. So how do I know if it is defective or do you think that water can find its way in. Again, does it has its own fault code
Was this
answer
helpful?
Yes
No
Monday, January 10th, 2011 AT 7:22 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Is can be damaged by wiring or sensor shorting out.

Don't worry about the PCM first, get the throttle actuator tested first.

When trouble shooting problems, we start from the cheaper and easier way first. Each trouble code should be attended to as it is starting from the lowest code.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, January 10th, 2011 AT 7:33 PM
Tiny
DECAPTAIN2010
  • MEMBER
  • 75 POSTS
Thanks. Wen I erased the codes then as I retrieved them again I got P2107, p2135, po721, po222, p2110, p2104, p0451. Should I go ahead to change the throttle body since they are related to it and no specialist to test those things u talk about, so I cant continue to waist time or what do you think. The engine RPM is about 840, intake Temp is 1075, throttle position is bt80% to 90%. When the I on the ignition the throttle plate clips or just open very slightly and close back.
Was this
answer
helpful?
Yes
No
Monday, January 24th, 2011 AT 5:20 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Replacing the throttle is the easiest way to confirm if it is bad and could save you a lot of headaches.
Was this
answer
helpful?
Yes
No
Monday, January 24th, 2011 AT 5:31 PM
Tiny
DECAPTAIN2010
  • MEMBER
  • 75 POSTS
Thanks. What about the accelerator pedal, do you think it has gone bad too
Was this
answer
helpful?
Yes
No
Monday, January 24th, 2011 AT 5:38 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Both components are interrelated so I would start off by replacing one component first.
Was this
answer
helpful?
Yes
No
Monday, January 24th, 2011 AT 5:49 PM
Tiny
DECAPTAIN2010
  • MEMBER
  • 75 POSTS
Thanks.A toyota camry shows code Po773 shift solenoid E electrical and the vehicle speed could not go beyound gear 1 I was just wandering what could it mean, please I am sorry for bodering you. Thanks
Was this
answer
helpful?
Yes
No
Monday, January 24th, 2011 AT 5:57 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
What year and engine type?
Was this
answer
helpful?
Yes
No
Monday, January 24th, 2011 AT 6:03 PM
Tiny
DECAPTAIN2010
  • MEMBER
  • 75 POSTS
1997 and it is a 4 plug engine type
Was this
answer
helpful?
Yes
No
Monday, January 24th, 2011 AT 6:45 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
DTC P0773: LOCK-UP SOLENOID

1. Access ECT ECU. See Fig. 1. Using ohmmeter, check resistance between terminal SL and body ground with connector removed from ECT ECU. See Fig. 5.

2. Resistance should be 11-15 ohms. If resistance is as specified, replace ECT ECU. If resistance is not as specified, remove transaxle oil pan. Disconnect electrical connector (Pink wire on Camry and Camry Solara or Yellow/Black wire on Celica) at lock-up solenoid.

3. Check resistance between electrical terminal on lock-up solenoid and body ground. Replace lock-up solenoid if resistance is not 11-15 ohms. If resistance is 11-15 ohms, check and repair wiring between lock-up solenoid and ECT ECU.
Images (Click to make bigger)
Thumb
Thumb
Thumb
Thumb
Was this
answer
helpful?
Yes
No
Tuesday, January 25th, 2011 AT 1:38 AM

Please login or register to post a reply.

Related Engine Low Power Content

Fix an Engine with Low Power!
VIDEO
Fix an Engine with Low Power!
Instructional repair video
Symptoms of Low Engine Power
GUIDE
Symptoms of Low Engine Power
The power your car's engine is producing is important. When you step on the gas you need your car to accelerate, mainly to keep you out of trouble when getting onto the...
VIEW MORE

Sponsored links