Hey all!

I recently purchased a 2002 s-type with the 3.0 v6. The car is very smooth and feels solid but I'm having a problem with acceleration.

From a stop it accelerates fairly well, feels abit underpoweres though. But as soon as it gets to 3500,4000rpm it just hits a brick wall and will barely accelerate more. It will go from 4000rpm all the way up to 6500rpm VERY slowly. This happens in any gear.

Other than that the engine is super smooth and quiet, the gearbox shifts beautifully smooth.

Any ideas what it could be? The CEL is on but I have no means to check codes just yet.
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Update: no matter what gear I put it in, 2,3 or 4 as soon as the rpms get to around 4500 on hard acceleration nothing happens and the revs just kinda stop around 5000rpm

 

You NEED the codes.

An elm327 will at least read enough for now.

 

This is a huge clue. The computer is trying to get your attention to say something isn't right.

Where are you located? Does location SE mean Sweden? Not sure what to tell you there, but here in the Colonies most auto parts stores will read out codes for free.

However you retrieve the codes, make sure you record the actual 5 digit identifier, such as P0300. From there, plug that code into the chart here to learn what it means. Post a reply and we can help you:

http://www.jagrepair.com/images/Auto...os/PE20001.PDF

Don't rely on any definition given by a scanner or code reader. Those are often generic definitions that do not match Jaguar terminology, and can send you down the wrong path.

Oh, and welcome to the forum.

 

Thanks for the reply. Yes I live in Sweden, I'm from the UK. I know I need to get the codes checked but I've been to several places and theres a 2-3 waiting list just to check codes! Ridiculous.

I forgot to add, it's an automatic transmission.

I just wondered if anyone knew anything I could be checking while I wait.

Hoping the transmission isnt gona blow.. Can't be that though because it happen in every gear at the same rpm range!

 

Maybe check your wallet, as it's all just expensive guesswork without retrieving the codes.

Here's a quick search for basic code readers at Amazon Sweden:

https://www.amazon.se/s?k=obd+code+r...f=nb_sb_noss_1

I'm sure you could find something similar at any local auto parts store. You may want to spend a little more for a scanner instead of just a code reader. A scanner is more versatile, and can read live data in addition to simple fault codes. I have a Bluetooth doohickey that uses my phone as the scanner display. For any vehicle built in the last 25 years, you're going to want some means to retrieve the fault codes. It's just a basic tool you should have, like a set of wrenches, sockets, multimeter, etc.

 

Check my wallet? My wallet is fine and I have several obd2 scanners that will not connect to the car. Yeah it is guess work, and I'm able to spend money on guess work. I asked for possible reasons that could cause my issue, nothing about how much money I have or where to buy an obd scanner.

I work on my own cars, it's a hobby for me. I don't appreciate your rudeness.

What's the point in forums when all you get told is to check the codes? I literally said that isn't something I can do Right Now, I also explained Why.

 

You have not been here long so you may not have realised that Karl has a sense of humour that may be an acquired taste, he can also be incredibly helpful.

Getting the codes is usually the first step in diagnosis rather than taking a wild guess, same as your doctor doing tests.

 

See the PDF of codes. It could be any of the causes given.

Anything else would just be a guess.

If you want to guess, do.

 

Sorry, I am not being rude but how do I check codes when none of my readers will connect to the car? My only other option is jsut to wait the 2 weeks to get a garage to check.

Usually someone knows something about symptoms that are explained, usually how it is when you go to see the doctor. Lol

Again, I'm not being rude. Apologies if you think so.

 

The elm327 should work. If not, we have diagnosed that specific failure before.

 

I think if your scanners won't connect it's unlikely the garage will be able to either. I'd start by checking out the OBD port connections, do you have the wiring diagrams?
If not you can find them here JagRepair.com - Jaguar Repair Information Resource
I don't recall anyone having the symptoms you describe, I'd say we need to determine if it's the transmission or the engine first.

 

Alright thanks for the reply, I could post a video on YouTube of what's happening and paste it here if that would be of any help?

I don't have any wiring diagrams, so thanks for that! 😁

I have a Bluetooth obd with the phone app that said failed to connect to obd2, I have an older wifi one that says the same.. I also have a laptop with universal obd2 software that will not connect. When I say won't connect, it establishes a connection to the car but it will not read anything, usually comes up with "could not connect to ECU or could not read ECU"

 

I have one of those, it cycles through many ports for over 30 mins then finally says could not find correct port? Or something similar

 

How many kilometres/miles are on the vehicle? What type of fuel is being used? Do you have a service history of the vehicle?

Based solely on your description, and without the benefit of knowing the stored DTCs, one could guess there are issues with coil units misfiring, or perhaps not enough fuel pressure.

 

They usually just work so it is quite likely something about your car's OBD / your device - bent pin, blown fuse, etc.

 

While guessing about faults, maybe blocked cats.

 

Are we allowed 2 guesses?

1) Muffler bearings
2) Rubber elbow under plenum

 

I'll go with muffler bearings 😂😂

Well **** hit the fan this morning, the car went crazy and almost caused me to crash!

It accelerated by its self, then to totally lost power (foot all the way down and nothing was happening revs at around 2000rpm) I then pressed the brake pedal at a junction and almost no brakes at all! I had to press the pedal as hard as I could to stop. Revs bouncing between 1000 and 1500rpm then the battery light came on.

 

..