- Jun 30, 2004
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In previous threads, I mentioned how I was searching for a replacement of my now-retired veteran mechanic of 15 years. I conversed with him briefly when he was closing down his operation. He spoke of the new owners, saying "they should be OK." So I'd decided to give them a try. And as I detailed in those previous threads, their Mechanic From Hell proceeded to create a cluster-f*** of damage after the service manager had pressured me to replace my valve-cover gaskets this year. That service could have been deferred for two more years.
The vehicle in question was my fabled 95 Trooper. My retired mechanic echoed the remarks of my smog-test man: "This engine is perfect!" and "Don't do anything to this engine -- this is a great engine!"
To replace the valve-cover gaskets, the intake manifold must be removed and then re-installed as a final step. The manifold has fittings for several sensors, the throttle-body, throttle position sensor, EGR valve and EGR VSV, MAP sensor, Intake Air Temperature Sensor, Fuel Pressure Control Valve and so forth. There are several vacuum hose connections which must be properly restored.
Immediately after the car was returned to me last summer, I discovered that the Mechanic from Hell had broken one of the pipes on the heater core when he removed the intake manifold. Worse -- he deceptively looped the ports on the engine to contain the coolant, leaving the SUV with no heat in the passenger compartment. When he proceeded to replace the heater core under repair warranty -- requiring dashboard removal -- he damaged the wiring harness connection to the steering wheel horn-switch and blew a fuse for the windshield washer/wiper. He had also failed to secure a small hose that ports coolant from the intake manifold to the radiator intake pipe.
After correcting all of these items, and about six months and ~2,000 miles later, I thought to monitor gas-mileage on the Trooper. It is supposed to be 14 mpg for city driving, although some had reported it as low as 12 mpg. My measurements put it at 10.7.
I investigated -- digging into my PDF factory shop manual. And then I discovered likely causes. The Mechanic from Hell had failed to reconnect the fuel pressure control valve to the intake manifold vacuum nipple provided for its hose. And he had broken my PCV valve in half -- a three-dollar item. Again, as an act of deception, he had merely fitted the two pieces back together, leaving another vacuum leak and PCV failure. With equal likelihood, the vacuum hose was accidentally disconnected either when the spark-plugs were replaced by the Shop of Horrors because of the hose's close proximity to the wires, or it was pulled off during the twice-repeated operation of removing and restoring the intake manifold.
Web-searches turned up lists of symptoms for both or either of these items: "Reduced fuel economy"; "dipstick smells like partially burned gasoline"; "Oil leaks -- arising from pressure build-up in the crankcase"; "The smell of pollutants (partially burned gasoline) from the tailpipe with engine idling". I was surprised that the smog-test results of late December showed nothing of higher HC ppm, CO% or higher NOx emissions. If I had continued driving the vehicle only for my confidence in these smog-test results, I might never have caught the problems, because the Trooper otherwise continues to drive and perform perfectly. Choosing to measure my gas mileage was a stroke of luck; I had dismissed the exhaust smells as something normal; and I had never bothered to smell the dipstick.
Even so, I gave myself three oil changes in the last 60 days. I was surprised at the color of the oil during the first oil-change: it was too dark after 2,000 miles since the last new oil. I also attended to sources of leaks, and installed a Valvo-Max drain-valve with thread sealer (see my thread about Fumoto and Valvo-Max). The leak had now been staunched so that I could identify the remainder of it coming from the rear main-seal or the pan gasket.
I ordered a new PCV valve for $3 at RockAuto and installed it. I reconnected the vacuum hose for the fuel pressure control valve. Then, I disconnected the battery and turned on the lights for 30 seconds to drain the charge in the engine computer. The exhaust gases disappeared; there is no smell of partially-burned gasoline on the dipstick. I am still evaluating gas-mileage, but I already see positive improvements looking at the fuel gauge and the odometer. When I deplete the tank and refill it, I'm confident that it will show stark improvement.
In addition to the basic symptoms, I had noticed after the Summer of Horror that my "Fuel Empty" dashboard light would go on frequently, even with a full tank of gas. While the Owners' Manual suggests that it will occasionally go on for reasons unexplained as "normal", this was a new phenomenon and much more frequent. This behavior has also now disappeared.
The prevailing advice suggests that the two items of concern can lead to damage in addition to the $20/month hit on my pocketbook: sludge build-up in the engine; corrosion of engine parts; damage to the catalytic converter.
If I drove the car for 2,000 miles before I discovered the disconnected hose and broken PCV valve, how much of such damage would be expected?
I'm guessing that the three oil changes may have mitigated the problem for another 1,000 miles since I started troubleshooting. But since all my knowledge has been gained from the shop manual and online advisories, I wouldn't know for sure. I wouldn't know for sure if damage had been done already. I have limited experience only with the vehicles I've owned.
As for the Repair Shop of Horrors and the Mechanic from Hell, I had deferred posting a searingly critical review on Yelp and other sites, because the shop-owners had at least been honest about their own mechanical experience, they honored their repair-warranties, and they were "nice kids" trying to start a business only in operation for six months when the carelessness occurred. One is a bookkeeper; the other had been a smog-test employee; but neither of them had the experience of my retired mechanic and his staff. Their problem is the Mechanic From Hell.
Should I post my review? Or should I just move on, warning people who ask me about it to "stay away from that place"?
UPDATE: The dipstick now smells only of fresh engine oil after 60 miles of driving. I continue to monitor MPG, but the fuel gauge and odometer provide hopes of 14 mpg.
The vehicle in question was my fabled 95 Trooper. My retired mechanic echoed the remarks of my smog-test man: "This engine is perfect!" and "Don't do anything to this engine -- this is a great engine!"
To replace the valve-cover gaskets, the intake manifold must be removed and then re-installed as a final step. The manifold has fittings for several sensors, the throttle-body, throttle position sensor, EGR valve and EGR VSV, MAP sensor, Intake Air Temperature Sensor, Fuel Pressure Control Valve and so forth. There are several vacuum hose connections which must be properly restored.
Immediately after the car was returned to me last summer, I discovered that the Mechanic from Hell had broken one of the pipes on the heater core when he removed the intake manifold. Worse -- he deceptively looped the ports on the engine to contain the coolant, leaving the SUV with no heat in the passenger compartment. When he proceeded to replace the heater core under repair warranty -- requiring dashboard removal -- he damaged the wiring harness connection to the steering wheel horn-switch and blew a fuse for the windshield washer/wiper. He had also failed to secure a small hose that ports coolant from the intake manifold to the radiator intake pipe.
After correcting all of these items, and about six months and ~2,000 miles later, I thought to monitor gas-mileage on the Trooper. It is supposed to be 14 mpg for city driving, although some had reported it as low as 12 mpg. My measurements put it at 10.7.
I investigated -- digging into my PDF factory shop manual. And then I discovered likely causes. The Mechanic from Hell had failed to reconnect the fuel pressure control valve to the intake manifold vacuum nipple provided for its hose. And he had broken my PCV valve in half -- a three-dollar item. Again, as an act of deception, he had merely fitted the two pieces back together, leaving another vacuum leak and PCV failure. With equal likelihood, the vacuum hose was accidentally disconnected either when the spark-plugs were replaced by the Shop of Horrors because of the hose's close proximity to the wires, or it was pulled off during the twice-repeated operation of removing and restoring the intake manifold.
Web-searches turned up lists of symptoms for both or either of these items: "Reduced fuel economy"; "dipstick smells like partially burned gasoline"; "Oil leaks -- arising from pressure build-up in the crankcase"; "The smell of pollutants (partially burned gasoline) from the tailpipe with engine idling". I was surprised that the smog-test results of late December showed nothing of higher HC ppm, CO% or higher NOx emissions. If I had continued driving the vehicle only for my confidence in these smog-test results, I might never have caught the problems, because the Trooper otherwise continues to drive and perform perfectly. Choosing to measure my gas mileage was a stroke of luck; I had dismissed the exhaust smells as something normal; and I had never bothered to smell the dipstick.
Even so, I gave myself three oil changes in the last 60 days. I was surprised at the color of the oil during the first oil-change: it was too dark after 2,000 miles since the last new oil. I also attended to sources of leaks, and installed a Valvo-Max drain-valve with thread sealer (see my thread about Fumoto and Valvo-Max). The leak had now been staunched so that I could identify the remainder of it coming from the rear main-seal or the pan gasket.
I ordered a new PCV valve for $3 at RockAuto and installed it. I reconnected the vacuum hose for the fuel pressure control valve. Then, I disconnected the battery and turned on the lights for 30 seconds to drain the charge in the engine computer. The exhaust gases disappeared; there is no smell of partially-burned gasoline on the dipstick. I am still evaluating gas-mileage, but I already see positive improvements looking at the fuel gauge and the odometer. When I deplete the tank and refill it, I'm confident that it will show stark improvement.
In addition to the basic symptoms, I had noticed after the Summer of Horror that my "Fuel Empty" dashboard light would go on frequently, even with a full tank of gas. While the Owners' Manual suggests that it will occasionally go on for reasons unexplained as "normal", this was a new phenomenon and much more frequent. This behavior has also now disappeared.
The prevailing advice suggests that the two items of concern can lead to damage in addition to the $20/month hit on my pocketbook: sludge build-up in the engine; corrosion of engine parts; damage to the catalytic converter.
If I drove the car for 2,000 miles before I discovered the disconnected hose and broken PCV valve, how much of such damage would be expected?
I'm guessing that the three oil changes may have mitigated the problem for another 1,000 miles since I started troubleshooting. But since all my knowledge has been gained from the shop manual and online advisories, I wouldn't know for sure. I wouldn't know for sure if damage had been done already. I have limited experience only with the vehicles I've owned.
As for the Repair Shop of Horrors and the Mechanic from Hell, I had deferred posting a searingly critical review on Yelp and other sites, because the shop-owners had at least been honest about their own mechanical experience, they honored their repair-warranties, and they were "nice kids" trying to start a business only in operation for six months when the carelessness occurred. One is a bookkeeper; the other had been a smog-test employee; but neither of them had the experience of my retired mechanic and his staff. Their problem is the Mechanic From Hell.
Should I post my review? Or should I just move on, warning people who ask me about it to "stay away from that place"?
UPDATE: The dipstick now smells only of fresh engine oil after 60 miles of driving. I continue to monitor MPG, but the fuel gauge and odometer provide hopes of 14 mpg.
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