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700 trouble free miles, with a few quirks [message #142372] Sun, 04 September 2011 14:20 Go to previous message
Andrew is currently offline  Andrew   United States
Messages: 213
Registered: April 2011
Location: Connecticut
Karma:
Senior Member
700 trouble free miles, a new personal record. 1700 miles since the beginning of July, and a few thousand more to go on this trip. We are in Boston now and will be heading to the west coast soon.

A few quirks I've noticed along the way, wondering if anyone has any thoughts:

1. I feel a bit of wander, I think from the rear. The front end doesn't seem to pull, and it's much more noticeable while towing a 3200# car. I've checked ride height and tire inflation (frequently), and read Jerry Work's alignment guide. I replaced all of my steel wheels with new Eagles, which helped a lot but didn't fix it completely. Next step is a six wheel alignment at a shop that knows what they're doing, right? Any recommendations in the Boston/southern New England area?

2. My oil pressure gauge is bouncing around with engine speed. I know this is normal to some extent, but it bothers me that it reads almost zero at low idle. Highway speeds bring it up to slightly low of half way. I've checked the oil level (frequently), and it seems fine, I don't entirely trust my dipstick because it's a bit bendy and I'm never sure it's reaching all the way into the sump, but I added a quart of oil and saw the level rise as expected. I think I'm now a quarter or half quart high of full. No change in gauge behavior. Is my sender bad?

3. My speedometer reads consistently low at highway speeds, by 7-10%. It's much closer at slower speeds. I measured my odometer against mile markers, and it's 0-5% low, measured over several 20 mile stretches. Does that indicate worn gears? Do these speedos get rebuilt?

4. (I saved the best for last) I am having some kind of fuel delivery problem, still after replacing the fuel pump. Freshly cleaned tanks, new lines, new filters, but:

- she's sometimes a little hard to start still..several long pumps of the accelerator will get it after sitting for a day or two. Several more if longer. She often cuts out right after startup unless I hold the accelerator down a bit as soon as she catches (after ten seconds or so, I can let go and she falls into the normal startup elevated idle, and holds for a few mins until I tap the accelerator again and she drops to low idle...that part is normal, right?).

- she will often hesitate under heavy acceleration (on ramps, hills). Never misses more than a fraction of a second, but always concerns me, because:

- she occasionally stalls, usually when coming down to idle from higher speeds. It happens with a full tank, with a half tank, when pointed up hill, and when pointed down. Most noticeable in traffic, like when hitting a slowdown on a highway. So far she always starts right back up, but worries me every time.

- my wife followed behind in the car for a few hundred miles. A few times, she saw what she called a "backfire". I didn't feel it as such, but she described it as a puff of white "smoke". I did feel some roughness, but it was hard to differentiate between the hesitation, a normally loud cockpit, bumpy highway road, etc.

I'm thinking I need to adjust the idle, and hunt down any possible ingress of air into the (wrong part of the) carb. Am I on the right path? Any other ideas? Could the white "smoke" be a fuel impurity issue?

Thanks for your help and advice!

1973 Sequoia 260 (since 2011)

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