my buddy has a 92 i believe escort gt it studders when you stomp the throttle but if you gradually rev it up it goes fine. any possibilitiesor fixes. i was thinking vane air flow sensor

anyone have any fixes??

Check the rubber intake tube for cracks.

my buddy has a 92 i believe escort gt it studders when you stomp the throttle but if you gradually rev it up it goes fine. any possibilitiesor fixes. i was thinking vane air flow sensor

It sounds like a fuel delivery problem: Fuel Filter, low Fuel Pump pressure etc. Trouble codes present?
Do you know what type of Fuel System it has i.e. carburetor, CFI (Central Fuel Injection) or EFI (Multi-port electronic fuel injection)?

plugs and/or wires.

I had the same thing and got the same responses. check your plugs and replace your wires with cheap OEM. the OEM's probably wont last long, but will tell you if that was the problem. If not the problem, switch the wires back out and get a refund if you please, or keep the new ones as backup.

plugs and wires have been changed, the intake elbow is good no cracks, the vaf has been changed a little better, the cts was also changed it idles better, i told him to do the fuel filter it looks like it has been done recently but looks can be decieving. ill let you guys know.thanks for the help. it is mfi injection

plugs and wires have been changed, the intake elbow is good no cracks, the vaf has been changed a little better, the cts was also changed it idles better, i told him to do the fuel filter it looks like it has been done recently but looks can be decieving. ill let you guys know.thanks for the help. it is mfi injection

How about a gummed up throttle body(carb which ever you have) ? That could cause your troubles

tb looks clean

tb looks clean

looks clean? do you know what one looks like not clean by any chance?

yes i happen to know what one looks not clean. fuel filter did nothing.

plugs and wires have been changed, the intake elbow is good no cracks, the vaf has been changed a little better, the cts was also changed it idles better, i told him to do the fuel filter it looks like it has been done recently but looks can be decieving. ill let you guys know.thanks for the help. it is mfi injection

Suggest you test the MAP voltage output: Idle should be approx. 1 - 2VDC, WOT (Wide open throttle) should be 4 to 4.8 VDC. The EEC uses the MAP input to control fuel delivery, and ignition timing.

thanks souphound will have him check that out i asked him if it had a map sensor on it but he didnt know ill check tomorrow so map voltage should be pretty close to tps?

thanks souphound will have him check that out i asked him if it had a map sensor on it but he didnt know ill check tomorrow so map voltage should be pretty close to tps?

In terms of voltage........yes.
Also check the vacuum line from the MAP to the intake manifold for leaks.

no leaks from intake manifold when i measured voltage at ilde it was jumping all over the place form .7 to .3 and wot it went up to 4.3 then jumping all over the place up there too

no leaks from intake manifold when i measured voltage at ilde it was jumping all over the place form .7 to .3 and wot it went up to 4.3 then jumping all over the place up there too

Question:The MAF is solid state, are you using a DVOM for testing? (A DVOM should be used on any solid state circuit to prevent damage.)

Comment: We have to determine the cause of the voltage "jumping" There are four components tied together i.e. EEC, TPS, VAF and MAP. The EEC supplies 5V reference voltage and also ground.The signal voltage from the three sensors overlay each other and provide input back to the EEC.(To adjust fuel and timing). Your previous posts indicate you changed the VAF, so we will go to the TPS.
Question: Have you tested the TPS for both resistance and voltage?
Comment: I use an analog meter to check TPS resistance, and a DVOM to check TPS reference voltage (5V) from the EEC. Most TPS's are 3 wire: Black wire is (-) Center wire is signal, other outside wire is (+). Disconnect the sensor and read ohms between the two outside wires at idle the resistance should be approx. 'O' now increase the throttle very slowly toward WOT and watch the needle. It should increase smoothly. no jumps. If there are any jumps, the TPS is bad and needs replacing.
Let me know the outcome.

yes i am using a dvom, the vaf was changed, tps was changed.

yes i am using a dvom, the vaf was changed, tps was changed.

Good information on the DVOM. That eliminates the meter as the source of the 'jumping'

O.K.....Two components left. The symptoms and testing strongly suggests a faulty MAP. But, just to make sure the supply voltage from the EEC is not jumping around take a Reference voltage (5V) reading at the MAP harness connector using the two outside terminals in the connector. Engine off, Key ON. Reading should be approx. 4.8V. and steady. If, it's checks out O.K.....the MAP is faulty.... R & R.

my buddy went to some guy at a ford dealer and he was told there is no MAP sensor, it seemed like a map sensor that i measured but not sure?

my buddy went to some guy at a ford dealer and he was told there is no MAP sensor, it seemed like a map sensor that i measured but not sure?

I believe the Ford Dealer may have made a mistake.

If your buddy's car is a 1992 Ford Escort GT (1.8L) Fuel Injected, he can go to Advance/Autozone and buy a replacement MAP Sensor. At Advance the manufacturer is GP Sorensen, P/N 77911501 price is $47.97
Regards,

A '92 escort gt has no map (manifold absolute pressure) sensor. According to my haynes manual.

A '92 escort gt has no map (manifold absolute pressure) sensor. According to my haynes manual.

there are alot of parts not in a haynes manual so i personally wouldnt base any part just on what they say unless its a ford service book

A '92 escort gt has no map (manifold absolute pressure) sensor. According to my haynes manual.

Perhaps you are looking in the wrong section....or the MAP is referred to by a different name i.e. Barometric Pressure Sensor etc.
Unfortunately, I do not have a Haynes manual or I could give you a definitive reply with page number etc.
Maybe you can inform us the name of the component that senses air density, altitude, or engine load by a decrease in manifold pressure. It is a device approx. 2 1/2" square with a vacuum connection, and a three wire connector. Usually located on the R/H strut tower or the firewall.

The 1st gen. escorts used a map sensor. The 2nd and 3rd gen. escorts (1991 and beyond) did not. I couldn't tell ya' why as I didn't design the engine. I know what a map sensor looks like and I know it's function. Doesn't change the fact that these particular vehicles are simply not so equipped. Call any parts retailer or sevice facility to confirm this.

The 1st gen. escorts used a map sensor. The 2nd and 3rd gen. escorts (1991 and beyond) did not. I couldn't tell ya' why as I didn't design the engine. I know what a map sensor looks like and I know it's function. Doesn't change the fact that these particular vehicles are simply not so equipped. Call any parts retailer or sevice facility to confirm this.

good luck with your problem. Jman seem already know whats wrong or have the answer. But be sure to let us know what was wrong.

I had the same problem and just fixed it. (I still have the gunk under my nails.) My problem was one of my pistons seals failed (#2) and coverd the spark plug with oil this made firing very hard.

The 1st gen. escorts used a map sensor. The 2nd and 3rd gen. escorts (1991 and beyond) did not. I couldn't tell ya' why as I didn't design the engine. I know what a map sensor looks like and I know it's function. Doesn't change the fact that these particular vehicles are simply not so equipped. Call any parts retailer or sevice facility to confirm this.

jman63,
My Post #19 response to xsbc63C contained the Source, Manufacturer, P/Number and Price of the MAP Sensor, and the vehicle application. So, obviously what you are now suggesting, had already been done. Your post #20 took exception to the existance, had you followed the thread the MAP had been tested by xsbc63c.
My Post #22 tried to clarify the situation. Although you say you knew the purpose/function of the MAP, you didn't identify the device that took the MAP's place in the F/I sytem as I requested.
You said the 2nd and 3rd generation escorts did not have MAP sensors, would you please give me the time periods (Years) that fall within the 2nd generation to which you refer.
Thanks,

'91 thru '96 =2nd gen.

sounds like your ignition coil might be starting to go.

'91 thru '96 =2nd gen.

Thanks for the reply.
I think I see where the mis-understanding is. Correct me if I'm wrong, but it seems you are using 'Generation' as a specific span of years.
'Generation' is a nebulous term. I see where some 'Generation' definitions consider the 2nd Generation Escorts as 1988 1/2 - 1990.

As a technical person I use the data pertaining to the vehicle i.e. year, VIN code etc. P/N etc. to identify a part. However, those of us who try to help others on these forums troubleshoot problems rely on the clues in the narrative provided, which in most cases is non-specific. Not having books, manuals, wiring diagrams etc. for all makes and models, we rely on applying general knowedge in order to help solve a problem. It's easy to be tripped up by not having the advantage/s of 'hands-on' information or the vehicle to examine.

Once again, I doubled and triple checked the information I supplied to the 'Thread Starter' and found it to be correct. Other MAP Sensor P/N's for a 1992 Ford GT are as follows: #e67f9f479ala2a; e6tz9f479a;e7df9f479ala2a;e7dz9f479a........
I did not include these in my original response because of price ($61.80)
Have a nice day!

My bad fellas... I wasn't paying close enough attention, and wrongfully assumed we were talking about an LX rather than a GT. You are indeed correct.

yea ill tell him to pick up a map sensor.