Fixed my no start issue, now I have another... Now, the truck drives fine, no issues, hot or cold, however, when I come to a stop at an intersection sometimes it starts chugging a little bit. If I give it some gas or start moving again, it stops. If I continue to sit there sometimes it just dies. No loss of power at any point while moving. Only happens when im at a dead stop. Any ideas?
Fixed one issue and another arises...
- Thread starter treagan82
- Start date
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riphip
Full Access Members
Check your vacuum hoses & connections & let us know year, etc of your truck. Put it in your signature & we won't ask again. 
99WhiteC5Coupe
Full Access Members
The inside bore of the vehicle’s throttle body is probably dirty, as well as the edge of the butterfly valve.
At idle (such as stopped in drive), there is not enough air bypassing the valve, causing a rich condition and the chugging. If the a/c is on - it places an additional load on the engine at idle. Either condition can cause the engine to stall.
When you drive away, the blade opens and there is plenty of air - thus no loss in power.
I did find what appears to be a hose that has completely rotted away. https://drive.google.com/file/d/1GluhLzQWoBLm-nzBxo4mUZ7WFuhNsrl9/view?usp=sharing
Not sure if this is the cause or not, gonna have to get codes pulled tomorrow. I will definitely check out the TB. The air being on or off has no real effect on when it happens.
riphip
Full Access Members
When I bought mine, one of the first things i did was replace all the vacuum lines & PCV because I found a couple of lines that were mushy and cracked. Only had 100492 miles. Lot of heat under the hood. Check rockauto.com
Hamfisted
Full Access Members
If you can't find those two DPFE hoses locally, you can pick 'em up from Rock Auto for a few bucks.
https://www.rockauto.com/en/catalog...gr+pressure+feedback+(dpfe)+hose+/+pipe,10732
https://www.rockauto.com/en/catalog...gr+pressure+feedback+(dpfe)+hose+/+pipe,10732
So I am pretty sure the issue is fixed. I replaced the missing hose with some 5/16 fuel line with hose clamps on each end. It actually looks like the top connection (plastic)broke off, but there was still enough to get my new hose on. I also cleaned out the throttle body, paying special attention to the bypass hole. Seems to idle fine now. Thanks for the help guys!
Hamfisted
Full Access Members
Sounds good ! If you end up replacing the DPFE sensor you can find them over at Rock Auto as well as the correct hoses.
https://www.rockauto.com/en/catalog...sion,egr+pressure+feedback+(dpfe)+sensor,5088
https://www.rockauto.com/en/catalog...sion,egr+pressure+feedback+(dpfe)+sensor,5088
Sounds good ! If you end up replacing the DPFE sensor you can find them over at Rock Auto as well as the correct hoses.
https://www.rockauto.com/en/catalog...sion,egr+pressure+feedback+(dpfe)+sensor,5088
Hamfisted,
I must start by saying that I entirely appreciate the feedback you have shared with others, myself included when I had a question.
I bought, installed new EGR valve, DPFE (aftermarket) and hoses. The Aftermarket one failed me from day one, CEL kept coming back. Scratched my head. Finally had to go to the dealer and they installed a Motorcraft one after figuring out it was faulty, and voila problem solved.
Now I agree my DPFE malfunction could be an anomaly, but the headache it caused gave me pause on certain aftermarket items for my expy. OP, if you do go aftermarket, give the part a good shake down so you can replace if need be.
GL
Hamfisted
Full Access Members
Rich I would agree you can't go wrong using factory Motorcraft whenever possible. Rock Auto offers Motorcraft for this part as well as other brands that are a little cheaper if you have to go that route for your budget.
HF, honestly, I forgot they sell MC parts. Doh! I actually never bought parts from them but probably shop them weekly for my wish list.
On a side note, work opportunities are tough in TX so I started an LLC. Lol. Selling military surplus, camping, hunting and possibly fishing. I'll test out an Amazon seller account. Already have my Secretary of State certificate, EIN, business bank account. Maybe this comment should be in the general discussion part. Sorry. I guess my point is I'm working to spend money (on anything including expy repairs) wisely and avoid extraneous expenses and time spent.
Hey good looking out, might pick this up anyway as I may have prematurely called it fixed. Its now an intermittent issue. Sometimes its falling flat on its face, sometimes it drives like normal again.Sounds good ! If you end up replacing the DPFE sensor you can find them over at Rock Auto as well as the correct hoses.
https://www.rockauto.com/en/catalog...sion,egr+pressure+feedback+(dpfe)+sensor,5088
That takes a high temperature silicone hose, not a common vacuum or fuel hose. I just did them on my '04.
Trainmaster
Old School Member
I had an aftermarket one fail too... Drove me nuts looking for the problem. Never again that Chinese junk.
I hear you and agree. The time/money to chase it down was crazy.
Eric Wheeler
Active Member
I know you problem is fixed, but it if happens again check your
VCT Control Solenoids
That was my issue. When I'm stopped at a light it wanted to die. Had to keep giving it gas (neutral) to stay running
Check your vacuum hoses & connections & let us know year, etc of your truck. Put it in your signature & we won't ask again.
He did it quick I like him all ready.
I have a 16v 5.4, I don't think I have these. Going to get some codes read and go from there. Will update later tonight.
Side note, this has been one of the most maintenance free and reliable vehicles I have ever owned. Really hopping to roll over 300k on this bad girl. So far I have replaced 1 plug, 1 coil pack, 1 rear wheel hub, 2 batteries, 2 sets of battery terminals, tires twice, breaks twice. Once I get her running again, its time to get the rear folding 3rd row working.
Ok gentleman, here is what the code reader says
P1074 System to lean (bank 2)
P2195 O2 sensor signal stuck lean bank 1 sensor 1
P2197 O2 sensor signal stuck lean bank 2 sensor 1
P1405 Differential pressure feedback sensor upstream hose off or plugged
P0171 System too lean (bank 1)
Sounds like im replacing some O2 sensors, but at the top of the page it says:
"ASE certified master technicians have seen this issue on your type of vehicle and the most likely solution is: replace mass air flow (MAF) sensor"
P1074 System to lean (bank 2)
P2195 O2 sensor signal stuck lean bank 1 sensor 1
P2197 O2 sensor signal stuck lean bank 2 sensor 1
P1405 Differential pressure feedback sensor upstream hose off or plugged
P0171 System too lean (bank 1)
Sounds like im replacing some O2 sensors, but at the top of the page it says:
"ASE certified master technicians have seen this issue on your type of vehicle and the most likely solution is: replace mass air flow (MAF) sensor"
riphip
Full Access Members
Get a can of mass airflow sensor cleaner & spray it down to clean it (outside of it's housing of course) See if that works for you first instead of throwing parts at it.
