Low Power when taking off from stand still
 

Hi
I do not think I have ever posted. So if this wrong I apologies in advance
so I have my very first 928
it is a 1983 automatic. 4.7 L-jetronic.
I have invoices from the previous owner of the work they did at a Porsche dealer. Aug of 2013
the car had at the time 55719 miles
I bought it April 2020 with 61400 Miles
I am just now getting around to drive it for fun. when I test drove it I did not push the car because it was not my car at the time.
no I realize it is very much under power from a stand still.
Here is what they replace at the Porsche dealer.
Air flow Sensor 612.00
Fuel Filter 38.00
Thermo Valve 36.00
Fuel Pump Relay 128.00
Temp Switch 123.00
Timing Belt (the works) 1400.00
Spark Plugs 45.00
and they noted on the invoice that they clean the injectors
I am getting spark on all the plugs. and I am also getting voltage at all the injectors i tested them with light
with the* the labor it all adds up to almost 7000.00
I am at a lost of what to look for to try to figure this out
any help would be grate*
​​​​​​​thanks in advance

:confused:

Austin,

First thing: Congrats on your 928
2nd thing: Where are located?
3rd thing: Automatic 3 speed transmission?
4th thing: How much have you driven it since the Porsche dealer graciously looked at your car?