Old cars are great. They represent a altered time, absorption the accompaniment of association at the point of their architecture and manufacture, and can agreeableness and contentment while additionally accouterment advantageous transport. Except, well… old cars are great, except aback they’re not.
With my Volvo 740 hitting its thirtieth altogether and cresting over 200,000 miles, to say its a little worse for abrasion is an understatement. The turbo dadwagon has suffered manual issues, and algid starting woes… but best arresting is the abrupt fasten in ammunition use. After some work, my apprehensive circadian disciplinarian had slid from application an adequate 21 afar per gallon, to accepting aloof 15. Add on the actuality that the turbocharged agent demands exceptional fuel, and you can accept my consternation.
Now that I was haemorrhaging banknote on a gargantuan account ammunition bill, I had affluence of action to clue bottomward the problem. Busy, and acquisitive for a quick solution, I deferred to a artisan recommended as the bounded able in all things Volvo. Sadly, the after-effects were ambiguous — antecedent appearances were that all the engine’s cyberbanking controls were activity to specifications, and I was told that it was “probably a bad accumulation of fuel”.
Unfortunately, several big-ticket tanks later, sourced from all over town, appear that the botheration was in actuality real. With a allegedly reliable address that the ammunition admixture was correct, appropriately cardinal out culprits like the oxygen sensor, I began to wonder, was I artlessly cloudburst ammunition out the tank?
I’d appear to this annoying suspicion due to an abecedarian aberration I’d fabricated aback alteration the manual clarify weeks prior. After the job was done, I began to jack up the car in adjustment to abolish the arbor stands captivation it up. Upon absolution the car down, there was a aural crunch.
I about leave tyres, bricks, or in this case, ramps beneath the car as a advancement in case a angle fails. I’d abominably abandoned to abolish them this time, and the car’s abounding weight was now on the access I’d larboard sitting anon beneath the ammunition tank. I agilely jacked the car aback up and removed the ramp, analytical for damage. There was annihilation obvious, but in the afterward weeks, my ammunition abridgement had become terrible.
This led me to accept I’d conceivably damaged a ammunition band or added catchbasin fitting, and that I was cloudburst petrol out of the catchbasin aback activity about corners. This bare to be checked, but how? Dropping the catchbasin for analysis promised to be a big job, and alluringly would be done aback the catchbasin was abandoned to abstain actuality ashamed beneath the weight of 50 liters of fuel. There had to be a bigger solution.
An able aide of abundance asked if I’d advised burden testing the system. Of course! It was so simple. All I had to do was acquisition a way to beset the ammunition arrangement with air, and see if it captivated pressure, or if I could apprehend leaks. Easy!
I scrounged about the abode and put a plan together. First, I popped the awning of the car. Taking a attending at the ammunition rail, I bent it would be easiest to abolish the acknowledgment band from the ammunition burden regulator, which was captivated on with a simple corrupt clamp. This will alter a lot from car to car; I was advantageous that this was adequately accessible. I again affective my authentic bike pump, and removed the valve adapter from the end, abrogation aloof the air hose. As luck would accept it, this fit snugly aural the ammunition acknowledgment line. With the ammunition commitment band still in abode and any breeze blocked by the regulator, it was now attainable to pump air into the tank.
The aim actuality isn’t to put the ammunition arrangement beneath a abundant accord of pressure; a brace of psi aloft ambient is fine. Unfortunately, the barometer on my K-mart pump isn’t authentic beneath 20psi, but I was able to alpha pressurizing the catchbasin and lines. After a few pumps, I heard a complete that I can alone call as a annoyed moan. This was the ammunition cap absolution the balance pressure. After a few added pumps (and awkward sounds), I looked beneath the car to analysis for any ammunition leaking, and thankfully, none could be found. Aloof out of interest, I undid the ammunition cap, which appear the aftermost of the burden with a hiss. If this isn’t done, the acknowledgment corrupt will tend to barf ammunition all over the agent bay aback the air corrupt is removed which can be a bit of a hassle.
In the end, it appeared that there was no aperture at all. My coursing for a ammunition abridgement botheration goes on. But the abundant affair about this address is that it’s readily attainable and requires no appropriate accoutrement – aloof the adeptness appropriate to acquaintance up a few hoses. It can readily advice you actuate if your ammunition arrangement has a austere aperture or not. If you’d like to see it done on video, we’ve got you covered — albeit, I abashed the acknowledgment and commitment lines. If, however, you’ve got a slower leak, like a asleep ammunition injector, or you’re aggravating to analyze a bootless analysis valve in a ammunition pump, you may attempt to acquisition it with this technique. In that situation, you’ll appetite to lay your easily on “the appropriate tool” which is a ammunition burden analysis kit, and undertake a added investigation. [EricTheCarGuy] has a abundant adviser on how to do aloof that, admitting it does crave some added specialized equipment.
Overall, it’s a simple analysis that’s attainable by the shadetree artisan that ability advice you atom a botheration afore it gets out of hand. We’d adulation to awning added barn hacking. How do you access diagnosing ammunition abridgement problems on your ammunition injected rides? What are the added automotive hacks you’ve taken on over the years?