Rough Cold Idle

[robz95xj]

any idea what could cause this?its fine when warmed up but runs like shit when cold.im sure its a sensor of sort but not sure where to start, is my truck(92 5.0 f150)

[v_dub_ya]

On some of our old meter reading trucks (90-93) F150s the throttle body would get really gunked up which caused some rough idling. We used throttle body cleaner and put it on a rag and rubbed it inside the throttle body and on the butterfly and then, with the engine running, you can spray it directly into the throttle body.

Could also look towards the coolant temp sensor.

[robz95xj]

dub ya any sugestions on cleaning the TPS and or IAC, dint want to replace em since its like $77 for one and $40 for the other

[ford_racer]

Get some Mass Air cleaner. DO NOT USE CARB CLEANER. It will **** up your electrical contacts.

Take the IAC off, and empty half the bottle into the thing. Give it some time to dry, re-install, and test.

Do the same with the MAF if you thing it's the problem.

However, if the IAC is the problem, cleaning it is only a temp fix. You'll have to get a new one eventually.

[Marek]

your AMM or MAF might be defective. If you want to be sure that it is in fact busted, when your car is on on idle, unplug the AMM/MAF and if the idle isnt affected whatsoever then its busted.

good luck buck!

[robz95xj]

cleaned the throttlebody with throttle body cleaner and it fixed the problem, now to fix the bad gas milage

[American Psycho]

obviously do a full tune up.

- Plugs bosche platinums+4 $6 each and go for up too 100,000 miles
- Wires
- Cap/rotor
- Oil change
- Fuel Filter
- Air filer
- Adjust your tire pressure
- easy on the fuel pedal

and see where your timing and TPS is at.

[Soup]

fuel economy fix: trade the f-150 for an escort.

[American Psycho]

Originally Posted by Soul

fuel economy fix: trade the f-150 for an escort.

quick brilliant answer


X2

[bmxer99]

i think i found the problem, oh yeah its a ford

[01mmmz28]

there is a small hole on the throttle body blade that allows air to come in at idle. Make sure this small hole is not clogged up or blocked in any way. If it is only during the cold, moisture may be getting in there somehow and causing the maf to read poorly upon cold start up. clean the maf and the throttle body and see is that helps. If not, try the fuel filter, mine acted up during the cold before, because it was dirty and needed replacing.

[robz95xj]

am thinkin of trying plugs, wires cap and rotor and O2 sensor, am really about done puttin money into it need to get the jeep back together

[robz95xj]

Originally Posted by Soup

fuel economy fix: trade the f-150 for an escort.

find me a escort that can haul jeep parts, as in big ass tires and axles

[American Psycho]

Originally Posted by 01mmmz28

there is a small hole on the throttle body blade that allows air to come in at idle. Make sure this small hole is not clogged up or blocked in any way. If it is only during the cold, moisture may be getting in there somehow and causing the maf to read poorly upon cold start up. clean the maf and the throttle body and see is that helps. If not, try the fuel filter, mine acted up during the cold before, because it was dirty and needed replacing.

forgot about the hole. normally just enlarge it a bit.

[Soup]

Get a wagon. I fit all four of the 30" tires for my samurai into my sedan corolla no problem, a wagon could fit tons more.