Acceleration problem with my Jeep Wrangler TJ 4.0

Wildman

Over Analizer Extraordinaire...............
Supporting Member
Joined
Dec 12, 2015
Messages
962
Location
In the hills of WA
Have you done a compression test on each cylinder? Also as suggested I'd check your fuel pressure and make sure it is correct. It doesn't sound right in the videos.
 

CharlesHS

TJ Enthusiast
Supporting Member
Joined
Mar 10, 2020
Messages
171
Location
Carmel Mountain
Please help me for fix the problem
As previously posted.... check the fuel pressure.
The lower fuel pressure can allow the engine to run at idle, but when more fuel is needed due to the increase in throttle the drop in fuel pressure will starve the engine and the power will drop off.
 
OP
S

stefio1992

New Member
Joined
Mar 25, 2020
Messages
12
Location
italy
at this point I replace the injectors and the pump and float which do you recommend?
because it often marks me zero even if there is petrol
 

xxdabroxx

TJ Addict
Joined
Mar 31, 2017
Messages
1,394
Location
Central California, CA, United States
Your fuel gauge issue is likely do to a float problem with the sending unit in the fuel tank. But it could also be a wire issue that isn't directly related to the fuel pump assembly. I agree with others that the first step should be to check the fuel pressure at the rail.

Also, you can get a factory service manual for your jeep on this website. https://wranglertjforum.com/threads...ice-manuals-fsm-technical-documentation.4618/
 

Goatman

TJ Expert
Supporting Member
Joined
Apr 23, 2019
Messages
3,021
Location
Upstate NY
Jeep held production up in 96 due to federal mandated obd2 requirements in 96 and wasn't going to update the entire YJ electronics for just 1 production year when they had the TJ replacing it in 97. So there were no USA wranglers sold as a 96. The rest of the world did not require the obd2 system. So Jeep rolled out early production TJs over in Europe and I think Australia too. Then 97 model year the TJ was sold in the US.