Thinking about getting my car remapped, not for performace, more to improve efficiency, its the honda 2.2 cdti, currenlty giving me 35 mpg 😡 anyone had it done? what sort of MPG increase did you see? who did it for you?

Cheers

Stu

Had it done on my beemer. The 5mpg increase is almost exactly wiped out by the increased insurance premium. However it is a damn site faster when you put your foot down. 🙂

You should look at your driving style first. Those Hondas are not the best in class for efficiency but not the worst either.

I once spoke to a remap company about remapping purely for efficiency and they treated me like I’d asked them for oral sex with their dog.

You should be getting alot more than 35 mpg out of that car anyway. book figure is 55mpg combined. so i’d expect to be seeing 45-50 mpg depending on the type of driving you do.

Infact i reckon most people would stuggle to get as low as 35 mpg out of them if the book figure is genuine.

I once spoke to a remap company about remapping purely for efficiency and they treated me like I’d asked them for oral sex with their dog.

Well once you’d got the dogs hopes up I hope you obliged. Some dogs don’t cope well with that kind of rejection.

If you’re getting that low a figure though either you’re arriving at the figure incorrectly, or its broken or you’re driving it wrong.

As above any remapp would have to be pretty impressive to offset the increased insurance cost…. of course then you are limited to which companies will insure a modded car too.

A remap will help mpg but only because it’s producing more power for less throttle
So the only way to improve the economy is to not use the extra power 🙂

I had mine done a few years ago on my 2.2tdci Mondeo. I had a horrible flat spot around 1900rpm. Most of my commute is in stop/start traffic and I still average around 35-39mpg depending on weather (warm air increases MPG but decreases performance). I was getting around 32-35mpg before so not too bad and increase percentage wise.
On a run like down to Spain fully loaded and driving within the speed limits I have seen nearly 60mpg which for a big heavy car isn’t bad at all.
The performance has increased massively and even if driven hard I’ve not had it go below 30mpg. I have not changed my driving style but the biggest gains in MPG when remapped is that you don’t need to use the throttle as much. If I did change my driving style I would expect to see another 5% increase on MPG over what I already have.

Funky Dunc comments about insurance needs to be take into consideration. When I remapped mine the main insurance companies wouldn’t touch it including the one I was with forcing me to change insurers. Plenty of specialist companies will insure modified cars and Chris Knott that I’m with now are still cheaper than I was paying with a standard car with a main stream insurance company years ago.

Quite nice to see another Honda with lowish mpg, as I’ve recently bought an Accord Tourer 2.2 and I must admit I’ve been quite disappointed with the mpg (taking it from what the on board computer says). From Bath to Snowdonia and back the other weekend had an av 42.6, driving quickly but not silly fast. Usual round town driving way lower.
Not too bothered as love the car and quicker & mpg better than previous car. Would be nice to see an improvement though. Says 8k to next service but was thinking of changing air filter to see if that helps? But chipping sounds interesting, how muchare we looking for that?

You don’t say what Honda you have but 35MPG does seem a pit pap. I’ve got an accord with the same engine and average 44MPG. May be worth looking at reasons why it is so low. Unless you do lots of stop/start driving and/or rag it.

Anyway have a word with Fahad at Premier Tuning. http://www.premiertuning.com

He’s heavily involved in the Type Accord website http://www.typeaccord.co.uk and has a good reputation/history of chipping the Honda 2.2

insurance increase ? just dont tell them

Hi

I had two mk VII Accord 2.2 cdti Tourers and did almost 200k in them. I averaged about 43-44 mpg. Plenty of people chip them and the typeaccord forum is good. You do have to watch the clutches though if you chip them. It’s a know weakspot.

Your 35mpg for a Civic 2.2 sounds bad unless you are doing a lot of stop start commuting. Maybe you need to get it looked at? My Mk VIII accord tourer 2.4 petrol does 30mpg.

Tony

maccruiskeen – Member
If you’re getting that low a figure though either you’re arriving at the figure incorrectly, or its broken or you’re driving it wrong.

I’m not so sure about that.

Last place I worked, there were 3 people with Honda’s that had the 2.2 CDTi engine; a Civic, an Accord and an FR-V.

None of them could get much above 40mpg, unless on a long run. They all liked the engine, but none of them were impressed with the economy.

Engine is pretty temperamental about the correct grade of oil and being over or under filled. Check that first you should be using 0w30.

insurance increase ? just dont tell them

What he said. How would they ever know, especially if you use something like a blufin to do the remap?

Unless your car’s been for an ECU flash at a garage on the same day as the remap, they can tell by the last changed date on the ECU.

But one would argue if the insurance company would go to such lengths to find out.

A pimped out car, with huge soundsystem, alloys and loud exhaust? Likely.

A totally standard spec family car? Highly unlikely.

Hmm.. just thought you should all know I calculated my fuel economy on the Passat the other day to check the trip computer’s accuracy. Turned out to be spot on – 56.2mpg for the tank 🙂 All motorway apart from about 20 miles of suburban roads.

i’ve got a 2.2cdti civic and over the last 3000 miles since getting it i have averaged 49.2 mpg and on a 200 mile run to Solihull and back averaged over 63, how are you driving it?

Hmm.. just thought you should all know I calculated my fuel economy on the Passat the other day to check the trip computer’s accuracy. Turned out to be spot on – 56.2mpg for the tank

Finished arranging all the food in the pantry into alphabetical order then?

i think i drive smooth to be honest, reset the trip last night on a motorway run, stuck at 70 and got 35.8mpg over about 10 mile, to be fair I have had this car from new and its never been any better. I would say 95% of our driving is stop start, small runs of about 3 – 5 mile max with the odd longer trip on a weekend.

I can get my car done for £250 as a friend runs a tuning company, this is a remap and not a plug in device or a cheap ebay air temp bodge.

I’m going to fully service the car in the next two weeks, I will be replacing the oil with 0w – 30 Fully Synthetic, using genuine filters, even though the 37500 service does not require an air filter I will also be replacing that, the car I feel is well looked after and driven carefully.

You’ve got to wonder if its worth having a diesel at all if you’re only getting 35mpg.
Even a 2.0 petrol will do that. And you get to use all the rev range 🙂

Yeah but that Honda engine when pushed is a thing of wonder, knocks spots off a NA 2.0 petrol 🙂

reset the trip last night on a motorway run, stuck at 70 and got 35.8mpg over about 10 mile

Not long enough. Do a proper long journey and see.

I would say 95% of our driving is stop start, small runs of about 3 – 5 mile max

Well no wonder. That’s not representative, and a remap won’t make any difference. It’s a worst possible scenario for your car, and certianly wont’ be doing it any good mechanically. You should’ve got a petrol to be fair.

I used to do alot of competition mapping work about 15years ago and would suggest that manufacturers spend alot of time and effort and money making sure the map on the standard issue is about the best it can be as a compromise between performance/economy/tractability (i.e smoothness/driveability).

Any plug-in chip will make the compromise more noticeable, i.e. better performance but reduced tractability at low-end/part throttle, flat spots at a certain throttle opening/rpm etc etc. Yes, they can help improve fuel efficiency, however, that it more down to how the car /engine is driven/used.

If you really want to improve economy, forget the chip and pull the engine to bits – port match inlet/exhaust, increase valve sizes, air-flow valve stems (although remember that multi-valve engines, 4 valves per cylinder, require faster air-flow to be really efficient and that means higher RPM/more fuel), for starters. A balanced exhaust system that is free flow matched with inlet manifold will also make the engine more efficient and hence return better mpg or torque or bhp – whatever it is you are after. Obviously, after doing these internal mods, the manufacturers map is pretty much useless so you then need to spend the equivalent of a small countries gdp on a rolling road with a tuneable ecu/software to make it work.

Apologies if it sounds rather tedious and boring, it isnt really!

Or buy a different car.

Either way, have fun and learn!

35mpg froma honda civic?

I’m getting 53-56 consistently for the last 35000 miles on fast a road commuting. Have never seen mpg in the forties never mind 35mpg.

Are you using the economy lights/meter as a guide to driving style?

Have you had it checked by a honda garage? Sounds like somethings wrong to me.

I would say 95% of our driving is stop start, small runs of about 3 – 5 mile max with the odd longer trip on a weekend

Diesels excel on long journeys. Clocking up motorway miles, reliably and cheaply. Doing 3 to 5 miles is not really great for any car, but a petrol engine will handle it better and generally cost you less. Particularly when you factor in the cost of the car, the cost of the different fuels, and the increased cost of servicing and maintaining a diesel. And depending on the size of the car a petrol engine can still return up to and occasionally over 60mpg…