overheated
Thread Starter
|
Trailering
Joined: Jan 2026
Posts: 15
Likes: 0
overheated
i got a mazda tribute that blew a heater hose and died its a v6 3.0 2001......i am unable to get it running.....on ly thing i found wrong was a broken heater hose.....anybody had tha=e same problem.....looking for suggestion !!
Logistics Pro
Joined: Jun 2009
Posts: 4,808
Likes: 83
From: Cedar Rapids, IA
Welcome to the forum. You say you're "unable to get it running" but that could mean a lot of things. Does the engine not spin over? Did the engine stall from overheating, or did it shut off due to coolant getting into the electrical system? Have you checked for spark, fuel, injector pulse, compression? What is the condition of the oil on the dipstick?
-Rod
-Rod
Thread Starter
|
Trailering
Joined: Jan 2026
Posts: 15
Likes: 0
heater hose come apart under the battery tray,car stalled out and died so far i checked
oil is good,no sign of water
got fire on #4 spark lug
53 pounds of fuel pressure at rail
took off vale covers and check valves and timing chain,saw no trouble
boroscope pistons,all look well
i ran a fan on it for 3 days,it tries to fire up,but no luck yet....
looking for suggestions!
oil is good,no sign of water
got fire on #4 spark lug
53 pounds of fuel pressure at rail
took off vale covers and check valves and timing chain,saw no trouble
boroscope pistons,all look well
i ran a fan on it for 3 days,it tries to fire up,but no luck yet....
looking for suggestions!
Logistics Pro
Joined: Jun 2009
Posts: 4,808
Likes: 83
From: Cedar Rapids, IA
So by "tried to fire up" does that mean the starter motor spins the engine, it just does not start? Is cylinder #4 the only spark plug that has spark, or the only one you checked?
Assuming the starter spins the engine and you only checked for spark on cylinder #4, have you tried spraying throttle body cleaner or similar into the throttle body to see if the engine will fire up and run when provided fuel? If it does, then you'll need to check for injector pulse. Is the check engine light on or have you checked for any diagnostic codes? Also, it's not too uncommon for the catalytic converters to get plugged on this engine and, if bad enough, blow the EGR valve. You could try removing the upstream oxygen sensor to see if that will enable the engine to start by bypassing a possible exhaust restriction.
-Rod
Assuming the starter spins the engine and you only checked for spark on cylinder #4, have you tried spraying throttle body cleaner or similar into the throttle body to see if the engine will fire up and run when provided fuel? If it does, then you'll need to check for injector pulse. Is the check engine light on or have you checked for any diagnostic codes? Also, it's not too uncommon for the catalytic converters to get plugged on this engine and, if bad enough, blow the EGR valve. You could try removing the upstream oxygen sensor to see if that will enable the engine to start by bypassing a possible exhaust restriction.
-Rod
Thread Starter
|
Trailering
Joined: Jan 2026
Posts: 15
Likes: 0
i put some gas in the throttle body vent hose....it tried to start....fired a few times......fuel starvation? how do you recommend to check injector pulse?
no codes
no codes
Last edited by cxsr; Jan 3, 2026 at 12:38 PM.
Logistics Pro
Joined: Jun 2009
Posts: 4,808
Likes: 83
From: Cedar Rapids, IA
If there's an auto parts store nearby, they may have a noid light set in their rental tool cabinet. Or, if you happen to have an oscilloscope available to you and a backprobe set, you can check for injector pulse with an oscilloscope. If you don't have either of those, you could try monitoring the ground to an injector with a multimeter, but it will need to be a meter with a pretty high sampling rate since the pulse if very short.
-Rod
-Rod
Thread Starter
|
Trailering
Joined: Jan 2026
Posts: 15
Likes: 0
i thought about just pulling the whole rail out somebody tie wrap the injectors to the rail and crank it and see if any fuel come out......is this a dumb ideal?
Trending Topics
Logistics Pro
Joined: Jun 2009
Posts: 4,808
Likes: 83
From: Cedar Rapids, IA
I cannot really recommend that approach since it's generally not wise to spray fuel all over. It also could be pretty tough to remove the rail and injectors as a single piece without damaging something (harness, fuel rail, injector seals, etc.) and could be pretty tricky to reinstall without damage. Are you not able to cut a cable tie and get to it to put a new tie on? Over time the injector plugs do get brittle and the retention tabs may break off. Instead of wiring in a new pigtail or connector body, folks often resort to using cable ties to hold the connectors on. But that's usually done with the injectors and fuel rail in place, so I'd suspect you could cut the ties, test for pulse, and cable time back in place after the test.
If you test for pulse with a noid light and don't find any, be sure to check for power to the injector while the connector is off. The injectors receive power with the key in Run or Start from the PCM Power Relay and the ground side is pulsed via the PCM.
-Rod
If you test for pulse with a noid light and don't find any, be sure to check for power to the injector while the connector is off. The injectors receive power with the key in Run or Start from the PCM Power Relay and the ground side is pulsed via the PCM.
-Rod
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Logistics Pro
Joined: Jun 2009
Posts: 4,808
Likes: 83
From: Cedar Rapids, IA
Is this summary correct?
-Rod
- Engine ran immediately prior to issue, so fuel should not be stale
- 53 psi fuel pressure at the fuel rail
- With fuel added to intake, the engine will try to start (so there is spark and timing would seem to be correct, and apparently has compression)
- Confirmed that all 6 fuel injectors have power and injector pulse when engine is cranking
-Rod
Logistics Pro
Joined: Jun 2009
Posts: 4,808
Likes: 83
From: Cedar Rapids, IA
Oh, good find. I suppose it's possible that the restricted exhaust might have cause some overheating. Did you actually see the gauge read that it was overheating, or just there was steam from under the hood and the engine stalled, wouldn't restart, and found a broken heater hose? If the engine truly overheated, it's possible that the catalytic converter melted (maybe there's also a misfire?) and the exhaust restriction caused the engine to stall and not restart. Or maybe the coolant spraying under the hood caused a misfire that caused one or both converters to overheat and plug, etc.
But if the engine truly overheated, I doubt that the plugged exhaust would have been the root cause of the overheating.
-Rod
But if the engine truly overheated, I doubt that the plugged exhaust would have been the root cause of the overheating.
-Rod