Q: Backfire
Hello i have a serious backfire issue and here are the points. Checked timing Checked carburator cleaning and synchronisation. New sparkplugs New fresh petrol Good petrol pump Very high compression of 11.
Good stationary running but when i increase around 2500 rpm the engine backfires and doesn't come trough to higher rev's. Driving is nearly impossible.
1/ is the very high compression a possible cause 2/ cdi ignition is not working but on stroboscope measuring it seems working well 3/ a petronic is installed to replace the points
I'm scared the high pressure is the cause and means I have to rebuild the engine.
Would be great to hear an experts opinion
My car has 9999999 miles.
My car has a manual transmission.
The statements expressed above are only for informational purposes and should be independently verified. Please see our
terms of service
for more details
Get an instant quote for your car
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
What others are asking
What is the proper tire inflation?
It’s vital that your tires have the right amount of air in them. Too little (under inflation), and they’ll wear on the edges. Too much (over inflation), and they’ll wear down the center. Neither is a good situation to have....
Engine won't start.
You should get your 'no start' inspected (https://www.yourmechanic.com/services/car-is-not-starting-inspection) by a qualified technician. The most common problem on this vehicle for a 'no start' is the fuel pump and filter. The fuel pressure will have to be checked by a certified...
DVD and CD players jammed, navigation not working.
When the DVD player and the CD player on your vehicle cannot eject a disc it is because the loading/unloading motor in the unit has failed. Besides taking the unit apart to retrieve the discs there is not much that...
Car radio dead
Hello, this could be a simple problem to fix. If the fuse is blown it will cause the radio to have no power. You could also just have a bad radio, and if this is the case, the radio unit...
What rpm should it shift at
This depends entirely on your driving style, as the car will shift differently depending on your driving style. When you drive aggressively, your car will shift at a later RPM. If you hold the throttle pedal all the way down,...
Power steering warning came on?
Hi there, thanks for writing in. I'd be happy to provide my insight. This is a common issue in the Chevy Cobalt. The electrical system on modern cars is very sensitive and everything needs to be working nearly perfect in...
I have a 2004 6.0 diesel, ran hot, blown head gasket. I put new heads and all new parts and when I try to start it, it rolls over
Hello, thanks for writing in. I would need to get a little more information from you as to what is actually going on when you try starting it. If all of the work was done correctly, then the engine may...
What are the chances of my 1.2 i10 hyundai engine valves to be damaged after a timing belt breaks while driving
The Hyundai 1.2 litre motor is an interference motor and the engine is most likely going to bend the valves if the timing belt breaks when the engine is running.
Horn honks randomly
Hi There, There should not be any connection between your tires being low and the horn honking intermittently. The cause of the horn honking randomly is likely related to a short in the electrical system (https://www.yourmechanic.com/services/electric-problems-inspection). The horn switch in...
Related articles
A Buyer’s Guide to the 2012 Porsche Panamera
If If you’re looking for a four-door sedan, but you don’t want to sacrifice performance, the 2012 Porsche Panamera just might be a win for you. With a choice of seven different models – all of which provide the prestige...
A Buyer’s Guide to the 2012 Porsche Panamera Hybrid
Porsche Porsche is known for its prestige, power and performance, and its hybrid introduction to the Panamera line does not disappoint. While its hatchback design may put some off, the interior is nothing short of spectacular with well-appointed materials that...
How to Buy a Porsche Cayenne
The Porsche Cayenne is one of the premier luxury SUVs available on the market today. It is a rare combination of performance and luxury, with dashing good looks thrown in for good measure, and critics and drivers alike praise it...
Browse other content
Services
Maintenance
Estimates