My 7M-GE has a rebuilt engine with approximately 80,000 miles on it, new head gasket and so far, she'd been running on 91 octane up until the last few weeks. Rising gas prices and financial evaluations made me pinch pennies at the pump by switching to 87 octane...
Now my car isn't running and I've checked ignition system. Replaced an old distributor cap and rotor, cleaned plugs.
Did a check on my AFM as per the Factory Service Manual. Open and closed resistance of the measuring plate and terminal resistances read fine except the E2-THA, which read about 1400 ohms, but I didn't know if that was due to the temperature being 87 degrees F at the time of the check.
Checked my fuel system. I have pressure, hear the return, replaced my inline filter (which was spitting out rust dust), so I pulled my injectors and rail and they look spic and span. I've drained and am about to drop the tank to clean and check the pump itself and I'm getting pretty desperate for advice.
Did my sudden switch to regular gas have any effect on my car? I didn't hear any knocking before she gave out, but I am looking at a .pdf version of the owner's manual and it states:
OCTANE NUMBER
7M-GTE engine:
For optimum engine performance. Toyota recommends using premium type gasoline with an
octane number of 95 or higher (Research Octane Number).
However, if such premium type cannot be obtained, you may use gasoline with an octane number as
low as 91.
7M-GE engine:
Select the octane number of 97 or higher (Research Octane Number).
Use of fuel with an octane number lower than stated will cause persistent heavy knocking. If severe, this
will lead to engine damage.
If this is true, what should I do? And if this is not true, based upon what I've given, what else should I check? I would appreciate any advice from you all.
Now my car isn't running and I've checked ignition system. Replaced an old distributor cap and rotor, cleaned plugs.
Did a check on my AFM as per the Factory Service Manual. Open and closed resistance of the measuring plate and terminal resistances read fine except the E2-THA, which read about 1400 ohms, but I didn't know if that was due to the temperature being 87 degrees F at the time of the check.
Checked my fuel system. I have pressure, hear the return, replaced my inline filter (which was spitting out rust dust), so I pulled my injectors and rail and they look spic and span. I've drained and am about to drop the tank to clean and check the pump itself and I'm getting pretty desperate for advice.
Did my sudden switch to regular gas have any effect on my car? I didn't hear any knocking before she gave out, but I am looking at a .pdf version of the owner's manual and it states:
OCTANE NUMBER
7M-GTE engine:
For optimum engine performance. Toyota recommends using premium type gasoline with an
octane number of 95 or higher (Research Octane Number).
However, if such premium type cannot be obtained, you may use gasoline with an octane number as
low as 91.
7M-GE engine:
Select the octane number of 97 or higher (Research Octane Number).
Use of fuel with an octane number lower than stated will cause persistent heavy knocking. If severe, this
will lead to engine damage.
If this is true, what should I do? And if this is not true, based upon what I've given, what else should I check? I would appreciate any advice from you all.
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