Maserati Forum banner

1 - 20 of 32 Posts

·
Registered
Joined
·
73 Posts
Discussion Starter #1
My car had recently produced this surging feeling when cruising at about 2500 RPM
It felt like i was tapping the break when I was driving along a flat section of road, it was getting worse everytime I would go for a drive.
It tuned out that the MAF sensor was dirty.
With a good spray with MAF cleaner it's now good as gold.
It also helped with the cold start, it's starting much easier and running more smoothly straight away.
It also feels like i have more hp as well.
 

·
Registered
Joined
·
583 Posts
Hi Mas430,

thank you for posting this, I am having similar symptoms. I am changing the plugs out and will clean the MAF.

Kindly,
Stephen
 

·
Performance Specialist
Joined
·
4,713 Posts
FWIW, we find that cleaning the MAF can often help you identify a problem with the part itself but for some reason, we find that you'll often need a replacement sensor shortly afterwards. We have yet to have a MAF cleaned that worked for say, another full year. Others may chime in with different experiences but if you continue to have problem, just consider a replacement as opposed to continually trying to clean them.

Hope that helps
 

·
Registered
Joined
·
583 Posts
Is this another point of failure??? Just curious. My car just turned over 50k miles and within the past year I’ve noticed these symptoms.

Kindly,
Stephen
 

·
Registered
Joined
·
208 Posts
FWIW, surging is usually the first sign of CAM sensor failure. You don't need to get a hardcore scantool, but a $15 ebay unit will let you read OBD codes when you get weird things like that. If your MAF was the issue you will probably see weird O2 related codes as the inlet/outlet stoichiometry won't match.
 

·
Registered
Joined
·
208 Posts

Part 28 - same both sides. They're pretty reasonably priced, most cars are a bit less than that. If you can bother finding the Bosch part number and just ordering that you'll probably save half.

They're expensive enough to justify $9 and 15 minutes cleaning the MAF sensor first (pressure pack of MAF cleaner/Electrical Cleaner/Isopropyl Alcohol do not touch the sensor), and $15 on a scan tool to see if they're throwing a code.

O2 sensors, CAM, MAF and crank sensors can all cause similar issues, or issues that don't quite make sense. MAFs rarely let go compared tot he others. The others usually last 100 000kms on hot engines, longer on cold engines. Ours is definitely a hot engine...
 

·
Registered
Joined
·
583 Posts
Thank you sir. I might be too obsessive with making sure my car is in tip top shape....

Kindly,
Stephen
 
Joined
·
4,008 Posts
No offense, but I have never put a cam sensor on these cars and only like 2 crank sensors....The symptoms are not the same in the least...Cam and crank sensors are used for engine timing and generally work or they don't as a general rule...O2 sensors and air mass sensor can deteriorate and have the car lose performance without setting a fault.....Jason
 

·
Registered
Joined
·
208 Posts
No offense, but I have never put a cam sensor on these cars and only like 2 crank sensors....The symptoms are not the same in the least...Cam and crank sensors are used for engine timing and generally work or they don't as a general rule...O2 sensors and air mass sensor can deteriorate and have the car lose performance without setting a fault.....Jason
I've not played with enough of these cars to contest that. Cam sensors often fail on the BMWs I've played with and you get a surging RPM while driving. O2 sensors usually give idle wander. MAF tends to to cut out when trying to accelerate gently. Crank shaft sensor usually just outright fails to start, but intermittent faults will make the engine do strange things.... My first car had the CAM sensor and O2 sensor gone when I got it. Drove fine but just wanted to accelerate all on its own...
 
Joined
·
4,008 Posts
I wouldn't do anything until it does it again..Until you can duplicate something like that then you are just wasting time and spending money...How would you know if you had it fixed? When you do it for a living you measure twice and cut once..Jason
 

·
Registered
Joined
·
583 Posts
It’s been displaying those symptoms several times today and I know that you just don’t throw parts at a car without a reason.

Just open for suggestions.

Kindly,
Stephen
 
Joined
·
4,008 Posts
Ok, I guess you have a starting point with the cleaning the MAFS... My problem with internet suggestions is you'll end up replacing every sensor or component on the car based on my experience with internet forums...To each their own...Jason
 

·
Registered
Joined
·
208 Posts
Ok, I guess you have a starting point with the cleaning the MAFS... My problem with internet suggestions is you'll end up replacing every sensor or component on the car based on my experience with internet forums...To each their own...Jason
He is correct. Like I said earlier...
... a $15 ebay unit will let you read OBD codes when you get weird things like that...
 

·
Registered
Joined
·
73 Posts
Discussion Starter #18
I only went with the MAF clean as my mechanic said I should give it a clean and see how it goes, with the symptoms i was explaining to him it was the best place to start. He also said it might only last a little while and end up having to replace it, but at least you will have an idea what the issue is.
 

·
Super Moderator
Joined
·
3,352 Posts
I only went with the MAF clean as my mechanic said I should give it a clean and see how it goes, with the symptoms i was explaining to him it was the best place to start. He also said it might only last a little while and end up having to replace it, but at least you will have an idea what the issue is.
Isn't that exactly what Jeff @FormulaDynamics said 5 days ago? :unsure:
FWIW, we find that cleaning the MAF can often help you identify a problem with the part itself but for some reason, we find that you'll often need a replacement sensor shortly afterwards. We have yet to have a MAF cleaned that worked for say, another full year. Others may chime in with different experiences but if you continue to have problem, just consider a replacement as opposed to continually trying to clean them.

Hope that helps
 

·
Registered
Joined
·
583 Posts
Hello gentlemen,

Waving the white flag here....cleaned the MAF and that didn’t do anything. Ferrari tech said he had a 4200 in last week and replaced the MAF and poof...no more problems......

Jason, Lambertius and Formula Dynamics - guys what does everyone think here?

Kindly,
Stephen
 
1 - 20 of 32 Posts
Top