1971 Mercury Marquis - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > 429-460 Tech
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 09-04-2010, 04:41   #1 (permalink)
Registered User
 
Join Date: Sep 2010
Posts: 3
Question 1971 Mercury Marquis

I've recently become the new owner of a 1971 Mercury Marquis. What I know: its a 2V 429, she's got 126,188.8 miles since new, was a desert car, no rust, all original powertrain with no rebuilds. It gets what I think is phenominal mileage, 24-26 mpg city and 20-24 highway. She's got the simple gauges, speedo with idiot lights. Being as old as she is, I'd like to know whats going on. I want to add temp, oil psi, volt and a tach. So. What should I be looking for? Whats normal idle oil psi? Normal psi under heavy acceleration? Whats her normal operating temperature? Where does she redline? Normal level in the charging circuit? I had numerous trials and tribulations with getting her to run right and I think having actual full instrumentation would have helped greatly. Had burned fuseable link in the charging circuit, no horn(actually did, just didn't know how it worked) nonfunctional gas gauge, no blinkers or hazards, and no reverse lights. After 8 days of round the clock work and hanging out at the local autozone, with the help of the store manager, we got her running like a top and ready for the 700 mile drive back home. With only one break down which, may I say, could have well been prevented (overheated in the north texas desert because a rad flush and new rad cap slipped my mind as something to do before hitting the road), I think we got all the bugs worked out. I'll post a picture if I can figure out how. ..Thanks for any and all info, help or tips :)
71MercKid is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-04-2010, 11:52   #2 (permalink)
429/460 Fanatic
 
Paul Kane's Avatar
 
Join Date: Sep 2004
Location: San Francisco Bay Area
Posts: 548
cool Re: 1971 Mercury Marquis

Nice car! The engine is a high compression 429, around 10.5:1 compression ratio. Peak power is just below 5000 rpm, and more power can be had with a larger carburetor and a few other changes....all at the expense of the fuel economy, of course.

It would be best for you to install the gauges and then report back what your idle pressure, high rpm pressure, operating temp, etc, are. We'll tell you if anytting is a red flag.

Paul
__________________

We're on the web; click below:
High Flow Dynamics
Performance Components for the 429/460 Engine Family
Paul Kane is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > 429-460 Tech



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 08:31.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.