s4 tps problems
02-02-10, 07:29 PM
#1
s4 tps problems
Ok I have an 88 n/a I tested the ohms on it
The spec is
A to B
Idle .95 to 1k
Wot 4k to 6 k
My readings are
A to b
Idle .17k
Wot 6.69
Now A to C
Spec is
Idle 4k to 6k
Wot 4k to k values should decrease checking this.
My readings
Idle 6.88k
Wot starts at 1.01k drops to .82k
It says u can use contact cleanerto clean the plunger... Is my tps toast or what??
The spec is
A to B
Idle .95 to 1k
Wot 4k to 6 k
My readings are
A to b
Idle .17k
Wot 6.69
Now A to C
Spec is
Idle 4k to 6k
Wot 4k to k values should decrease checking this.
My readings
Idle 6.88k
Wot starts at 1.01k drops to .82k
It says u can use contact cleanerto clean the plunger... Is my tps toast or what??
02-03-10, 08:31 AM
#4
HAILERS
Join Date: May 2001
Location: FORT WORTH, TEXAS,USA
Posts: 20,563
Likes: 0
Received 21 Likes
on
19 Posts
When A to B was .17K with the TPS sitting at idle, did you try turning the TPS screw to get a reading of APPROX 1K ?????????????????????? You should have. You don't just check A to B and see if it read approx 1K and assume the TPS is bad if it does not.
When it says at idle, it MEANS with a fully warmed up engine with the water thermowax's cam off the roller i.e. waterthermowax not holding the throttle open any at all.
A to C should start out high at idle and drop in value as the throttle opens.
Bascically a silly check out of the TPS. Just reconnect all the plugs and fully heat up the engine. Then backprobe the green/red wire on the TPS conector on the harness side of the plug. The reading at idle should be approx 1vdc. Then slowly move the throttle to fully open. The value should rise from 1vdc to approx 4.5 to 5vdc when the TPS plunger is fully extended and with no glitches in between.
If the engine if fully hot and the waterthermowax is off it's cam/rollpin, and the value is not 1vdc, then adjust the TPS screw til it reads appox 1vdc.
When it says at idle, it MEANS with a fully warmed up engine with the water thermowax's cam off the roller i.e. waterthermowax not holding the throttle open any at all.
A to C should start out high at idle and drop in value as the throttle opens.
Bascically a silly check out of the TPS. Just reconnect all the plugs and fully heat up the engine. Then backprobe the green/red wire on the TPS conector on the harness side of the plug. The reading at idle should be approx 1vdc. Then slowly move the throttle to fully open. The value should rise from 1vdc to approx 4.5 to 5vdc when the TPS plunger is fully extended and with no glitches in between.
If the engine if fully hot and the waterthermowax is off it's cam/rollpin, and the value is not 1vdc, then adjust the TPS screw til it reads appox 1vdc.
02-03-10, 02:08 PM
#6
HAILERS
Join Date: May 2001
Location: FORT WORTH, TEXAS,USA
Posts: 20,563
Likes: 0
Received 21 Likes
on
19 Posts
Next time put the digital meter on VOLTS DC and with all plugs connected up, AND with a fully warmed up engine, just backprobe the green/red wire on the TPS connector (the side of the connector on the harness side NOT the TPS side) and adjust the reading to output approx 1vdc.
I count .90 to 1.10vdc as APPROX. Closer to 1vdc the better. Hot engine required.
I count .90 to 1.10vdc as APPROX. Closer to 1vdc the better. Hot engine required.
Thread
Thread Starter
Forum
Replies
Last Post
Jeff20B
1st Generation Specific (1979-1985)
73
09-16-18 07:16 PM
The1Sun
1st Generation Specific (1979-1985)
7
09-18-15 07:13 PM
