Engine Stumbles when accelerating - Page 2

Spartacus · 05-15-2011, 02:46 PM

Also, I should mention that the problem is very intermittent. sometimes it will run fine for 20-30 miles without it happening. Other times it will happen all day long. Never happens for the mechanic of course.

cre · 05-15-2011, 09:04 PM

Post specifics for your car when asking for help with problems: Year (done), engine (even if it's an '86.5 if could still have a swapped in 7M-GTE or other engine), and any engine related mods (fuel controller, turbo upgrades, afpr, BOV and how it's plumbed...

GE fuel pumps are just as reliable as the GTE fuel pumps... except for when they're being forced to work overtime from a N/A-T or similar upgrade.

What's the ignition timing set at and is it set right? Disconnect the O2 sensor next time it occurs and see if that changes anything. Test the ECU temp sensor in the kitchen with a pot of water on the stove and check at several temps.

Good luck with it! ciao

mof920 · 05-18-2011, 05:17 AM

Hrmn.. I wouldn't know bud. I'm still learning a lot about my supra. I'm cleaning my header right now then sending it to get resurfaced before I give it one more cleaning. Good luck mate.

05-15-2011, 09:04 PM	#12
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Post specifics for your car when asking for help with problems: Year (done), engine (even if it's an '86.5 if could still have a swapped in 7M-GTE or other engine), and any engine related mods (fuel controller, turbo upgrades, afpr, BOV and how it's plumbed... GE fuel pumps are just as reliable as the GTE fuel pumps... except for when they're being forced to work overtime from a N/A-T or similar upgrade. What's the ignition timing set at and is it set right? Disconnect the O2 sensor next time it occurs and see if that changes anything. Test the ECU temp sensor in the kitchen with a pot of water on the stove and check at several temps. Good luck with it! ciao __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

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05-15-2011, 02:46 PM	#11
Spartacus Stock Join Date: Apr 2011 Location: Washington D.C. Posts: 6	Also, I should mention that the problem is very intermittent. sometimes it will run fine for 20-30 miles without it happening. Other times it will happen all day long. Never happens for the mechanic of course.

05-18-2011, 05:17 AM	#13
mof920 Stock Join Date: Nov 2010 Location: Riverside, CA Posts: 7	Hrmn.. I wouldn't know bud. I'm still learning a lot about my supra. I'm cleaning my header right now then sending it to get resurfaced before I give it one more cleaning. Good luck mate.