O-Gauge Steamer
NAXJA Forum User
- Location
- Colorado Springs, Colorado
You would think that a set of stainless steel headers would dissipate the heat faster than the cast iron due to the thickness of the material. How do you feel about header wrap?
That is a beautifully simple way to explain it - I need to remember that. I had to explain it to a lady friend of mine a short while ago (was doing her brakes and needed to make a run to Advance, where it occurred) and, well... I really should've just saved my breath.Basically, the fuel boils in the fuel rail. This extra pressure drives the fuel back to the tank through the notoriously bad check valves. Creates a hard start rough running condition until fresh (cool) fuel arrives to save the day.
She's got a 350Z, so at least she'd know enough to laugh at thatJust tell her "its the vtak kickin yo."
I'm sure there are numerous threads about heat soak. I am not yet interested in work around solution of timers on fans or a timed electric water pump. When my XJ was newer I didn't have any problems. Over time, fuel pump, injectors, pre-cats, have all gotten on in life and the problem exists. Even with the TSB cellulose wrap on injectors #3 and #4.
When I bought my 97 XJ over the summer it had the tell-tale warm start problem. After checking the fuel pressure and believing the fuel injectors to be fine, I replaced the fuel pump and it starts on a dime, every time.
My 01 XJ with 330,000 miles has the original pre-cats, fuel pump, and injectors. Sometimes it takes a few cranks to get going but not as bad as the 97 XJ was before the fuel pump change. Many times it just fires up.
Over time ethanol has been more prevalent in gasoline. I also live at 6,500 ft.
Could fixing this heat soak issue be as simple as replacing the fuel pump assembly?
I'd really like to see someone do only their injector O-rings and report back whether or not that solves the issue.
Sure sounds to me like I should replace the fuel pump first and possibly remove the pre-cat after that. I don't recall- are there any sensors in the pre-cats? Don't know if I'll have any issues with codes...?